# Kronos Fusion Energy — Technical Library

> Open technical knowledge base (1005 pages) on the physics, validation, engineering, materials, methodology and open-science record behind Kronos Fusion Energy's breeder-burner fusion architecture. Breeder = HYPERION, a D-T spherical tokamak (Q 3.424, 88.7 MW). Burner = a D-3He tandem-mirror generator (MetroVolt, AEGIS). Every figure is a computed design target traceable to open Zenodo deposits (CC BY 4.0). The integrated machines are not yet built; construction of the HYPERION breeder is scheduled to begin in Q2 2027.

## Physics & Fusion Science
- [Ambipolar Confinement Physics](https://kronosfusionenergy.com/technical/ambipolar-physics.html): How an electrostatic potential confines a tandem mirror's ions.
- [Catalysed Deuterium–Deuterium (D–D)](https://kronosfusionenergy.com/technical/catalyzed-dd.html): Pure-deuterium operation removes the tritium supply problem but demands even higher performance. Kronos studies it as a fuel-flexibility endpoint.
- [Charged-Particle Self-Heating](https://kronosfusionenergy.com/technical/charged-particle-heating.html): How fusion's charged products help keep the plasma hot.
- [Current Diffusion](https://kronosfusionenergy.com/technical/current-diffusion.html): How the plasma current profile relaxes and evolves over time.
- [Deuterium–Helium-3 (D–³He) Fuel](https://kronosfusionenergy.com/technical/d-he3-fuel.html): D–³He is the burner's fuel — low in neutrons and ideal for direct energy conversion, at the cost of much higher temperature.
- [Deuterium–Tritium (D–T) Fuel](https://kronosfusionenergy.com/technical/dt-fuel.html): D–T is the most reactive fusion fuel and the breeder's choice. It is neutron-rich, which Kronos uses deliberately to breed tritium and drive the burner economy.
- [Disruption Physics](https://kronosfusionenergy.com/technical/disruption-physics.html): What actually happens in a disruption, and why avoiding it matters.
- [End Loss and Plugging in Mirrors](https://kronosfusionenergy.com/technical/end-loss-and-plugging.html): Why open-ended mirrors leak, and how the tandem-mirror plug fixes it.
- [Fusion Fuel Cycles Compared](https://kronosfusionenergy.com/technical/fusion-fuels-overview.html): A side-by-side of D–T, D–³He and D–D: reactivity, temperature, neutron budget, and where each fits in the Kronos breeder–burner strategy.
- [Fusion Gain (Q) and Engineering Gain](https://kronosfusionenergy.com/technical/fusion-gain-q.html): Q is fusion power divided by heating power. Engineering gain counts net electricity against all plant power. Kronos reports both, honestly.
- [Helium Ash Transport](https://kronosfusionenergy.com/technical/helium-transport.html): How fusion-produced helium moves and must be exhausted.
- [Ignition vs Driven Operation](https://kronosfusionenergy.com/technical/ignition-vs-driven.html): An igniting plasma sustains itself; a driven plasma is continuously heated. Kronos designs driven systems on purpose — they are controllable and honest.
- [Impurity Transport](https://kronosfusionenergy.com/technical/impurity-transport.html): How impurities move through the plasma — to be controlled for purity and radiation.
- [Mirror Confinement Physics](https://kronosfusionenergy.com/technical/mirror-confinement-physics.html): How a magnetic mirror traps particles — and why it needs plugging.
- [Negative Triangularity in Depth](https://kronosfusionenergy.com/technical/negative-triangularity.html): Why Kronos points the plasma's corners the 'wrong' way — and what it buys.
- [Neutronics](https://kronosfusionenergy.com/technical/neutronics.html): Tracking where fusion neutrons go — to breed, heat, damage or be shielded.
- [Plasma Edge Physics](https://kronosfusionenergy.com/technical/edge-physics.html): The thin, complex boundary region that disproportionately sets overall performance.
- [Plasma Equilibrium](https://kronosfusionenergy.com/technical/plasma-equilibrium.html): The force balance between plasma pressure and magnetic field that holds a steady plasma.
- [Plasma Power Balance](https://kronosfusionenergy.com/technical/power-balance.html): The accounting of heating in versus losses out that determines whether a plasma produces net power.
- [Plasma Pressure and Power Density](https://kronosfusionenergy.com/technical/plasma-pressure.html): How much fusion power a machine makes per cubic metre — and why high beta and high field maximise it.
- [Plasma Radiation Balance](https://kronosfusionenergy.com/technical/radiation-balance.html): Balancing useful radiation against radiated energy loss.
- [Plasma Start-Up Physics](https://kronosfusionenergy.com/technical/startup-physics.html): The delicate sequence of breakdown, ramp-up and reaching the operating point.
- [Plasma–Wall Interaction](https://kronosfusionenergy.com/technical/plasma-wall-interaction.html): The complex physics where the plasma edge meets solid surfaces.
- [Steady-State Operation](https://kronosfusionenergy.com/technical/steady-state-operation.html): Running continuously rather than in pulses — essential for a power plant, and a design driver.
- [The Centre-Column Challenge](https://kronosfusionenergy.com/technical/centre-column-challenge.html): Why the slim central column is the defining engineering problem of a spherical tokamak.
- [The D–³He Reaction in Detail](https://kronosfusionenergy.com/technical/the-dhe3-reaction.html): How deuterium and helium-3 fuse to helium-4 and a proton — all charged, ideal for direct conversion.
- [The D–T Reaction in Detail](https://kronosfusionenergy.com/technical/the-dt-reaction.html): How deuterium and tritium fuse to helium-4 and a 14 MeV neutron — the breeder's power source.
- [The Lawson Criterion and the Triple Product](https://kronosfusionenergy.com/technical/lawson-criterion.html): The Lawson criterion sets the minimum density-confinement product for net fusion power. The triple product adds temperature and is the field's standard figure of merit.
- [The Loss Cone](https://kronosfusionenergy.com/technical/the-loss-cone.html): The range of velocities through which a mirror leaks — and why plugs are needed.
- [The Power-Exhaust Problem](https://kronosfusionenergy.com/technical/power-exhaust.html): Getting the fusion power out without destroying the components it flows through.
- [What Fusion Is, and Why It Is Hard](https://kronosfusionenergy.com/technical/fusion-basics.html): Fusion releases energy by merging light nuclei. Confining a hot enough, dense enough plasma for long enough is the engineering challenge Kronos is built to solve.

## Validation & Reproducibility
- [How to Reproduce a Kronos Result](https://kronosfusionenergy.com/technical/how-to-reproduce.html): A step-by-step of how an independent reviewer downloads a Kronos deposit and re-runs it to the published numbers.
- [Reproducibility at Kronos](https://kronosfusionenergy.com/technical/reproducibility-overview.html): Every headline number is backed by an open deposit that anyone can download and re-run to the same result. This is the core of the Kronos credibility model.
- [The Breeder Validation Suite](https://kronosfusionenergy.com/technical/validation-suite-breeder.html): HYPERION's design point is checked by a suite of 23 validation tests spanning power balance, current drive, confinement, stability and the fuel cycle.
- [The Burner Validation Suite](https://kronosfusionenergy.com/technical/validation-suite-burner.html): The D–³He burner's closure is checked by 45 validation tests covering the fuel trajectory, power ledger, and the plug-density requirement.
- [Tier-1 and Tier-2 Reproduction](https://kronosfusionenergy.com/technical/tier-1-tier-2.html): Kronos grades every reproducible result as byte-exact (Tier 1) or within-tolerance (Tier 2), so reviewers know exactly what to expect.
- [What Reproducibility Does and Doesn't Prove](https://kronosfusionenergy.com/technical/what-reproducibility-proves.html): Reproducing a computation proves it follows from the model and inputs — not that the unbuilt machine will behave that way.

## Process & Methodology
- [Benchmarking Against Experiment](https://kronosfusionenergy.com/technical/benchmarking.html): Checking models against real machines before trusting them.
- [Design-Space Exploration](https://kronosfusionenergy.com/technical/design-space-exploration.html): Kronos scans tens of thousands of configurations to find where a machine genuinely closes, not just where it looks good.
- [Designing with Margins](https://kronosfusionenergy.com/technical/design-margins.html): Building in safety factors so a design point is robust, not fragile.
- [From Model to Shadow to Digital Twin](https://kronosfusionenergy.com/technical/model-shadow-twin.html): How the public interactive model is designed to evolve into a live digital twin once hardware exists.
- [Gate Reviews (G1–G4)](https://kronosfusionenergy.com/technical/gate-reviews.html): Kronos advances through evidence-based go/no-go gates rather than declaring success.
- [High-Fidelity Analysis](https://kronosfusionenergy.com/technical/high-fidelity-analysis.html): The full FEA, CFD and neutronics that must follow the reduced-order design before construction.
- [Reduced-Order Modelling](https://kronosfusionenergy.com/technical/reduced-order-modeling.html): Fast, physics-based models that scan the design space and reproduce the frozen point — the engines behind every number.
- [Sensitivity & Tornado Analysis](https://kronosfusionenergy.com/technical/sensitivity-analysis.html): Ranking which assumptions a result actually depends on.
- [The Freeze Discipline](https://kronosfusionenergy.com/technical/the-freeze-discipline.html): A 'frozen' design point is the single source of truth every Kronos artefact must reproduce.
- [The Honesty Framework](https://kronosfusionenergy.com/technical/honesty-framework.html): Kronos states its open questions on the same page as its results — as a design principle.
- [The Interactive 3D Model](https://kronosfusionenergy.com/technical/the-3d-model.html): The public, physics-grounded interactive model of both machines — a design instrument, honestly labelled.
- [The Kronos Design Methodology](https://kronosfusionenergy.com/technical/design-methodology.html): How a design point is chosen, scanned, and frozen — from parameter scans to a single reproducible operating point.
- [The Operating Window](https://kronosfusionenergy.com/technical/the-operating-window.html): The range of conditions over which a machine actually closes — reported, not just the peak.
- [The Path to Build](https://kronosfusionenergy.com/technical/the-path-to-build.html): What must be closed — gates, analysis, qualification, prototype — before Kronos cuts metal.
- [The Provenance Record](https://kronosfusionenergy.com/technical/the-provenance-record.html): Tracing every number back to its source, openly.
- [Uncertainty Quantification](https://kronosfusionenergy.com/technical/uncertainty-quantification.html): Kronos runs Monte-Carlo uncertainty studies so a design point comes with error bars, not false precision.
- [Verification & Validation](https://kronosfusionenergy.com/technical/verification-and-validation.html): Checking the code is right, and checking it matches reality.

## Innovations & Distinctives
- [Honesty as a Moat](https://kronosfusionenergy.com/technical/innovation-honesty-framework.html): Stating every caveat on the same page as every claim — turning candour into credibility.
- [Modular Product Housings](https://kronosfusionenergy.com/technical/innovation-modular-housings.html): One burner physics, three lengths — grid, defence and data-centre products from the same core.
- [Negative Triangularity by Design](https://kronosfusionenergy.com/technical/innovation-negative-triangularity.html): Shaping the plasma the 'wrong' way to suppress edge instabilities without extra control systems.
- [Radical Reproducibility as Strategy](https://kronosfusionenergy.com/technical/innovation-open-record.html): Publishing the engines, not just the results — so anyone can check Kronos rather than trust it.
- [Selling Materials, Not Just Electricity](https://kronosfusionenergy.com/technical/innovation-neutron-economy.html): Kronos's breeder has a product — tritium, neutrons, isotopes, helium-3 — before net electricity is ever proven.
- [The Frozen-Design Discipline](https://kronosfusionenergy.com/technical/innovation-frozen-design.html): One canonical operating point every artefact must reproduce — engineering rigour made visible.
- [The High-Field Compact Core](https://kronosfusionenergy.com/technical/innovation-high-field-compact.html): Using REBCO superconductors to reach fields that make a small, economical machine credible.
- [The Isotope & Helium-3 Platform](https://kronosfusionenergy.com/technical/innovation-isotope-platform.html): Turning the breeder's neutron flux into a strategic isotope and helium-3 business.
- [The Low-Neutron Direct-Conversion Burner](https://kronosfusionenergy.com/technical/innovation-low-neutron-burner.html): A D–³He tandem mirror that makes electricity directly — low-neutron, disruption-free, modular.
- [The Two-Machine Architecture](https://kronosfusionenergy.com/technical/innovation-two-machine-architecture.html): One machine breeds fuel and neutrons; a second burns clean fuel for electricity. Splitting the job is the core innovation.

## The Technology Stack
- [Direct Energy Conversion Technology](https://kronosfusionenergy.com/technical/direct-conversion-technology.html): Turning charged-particle energy straight into electricity, the burner's signature technology.
- [Fuel-Cycle Technology](https://kronosfusionenergy.com/technical/fuel-cycle-technology.html): Breeding, extracting and recycling fuel — the technology that makes the plant self-sufficient.
- [High-Temperature Superconducting Magnet Technology](https://kronosfusionenergy.com/technical/hts-magnet-technology.html): REBCO-based magnets are the enabling technology of the whole machine.
- [Manufacturing & Assembly Technology](https://kronosfusionenergy.com/technical/manufacturing-technology.html): How the major components are fabricated and integrated.
- [Materials Technology](https://kronosfusionenergy.com/technical/materials-technology.html): The superconductors, structures and plasma-facing materials the machine depends on.
- [Plasma Heating & Control Technology](https://kronosfusionenergy.com/technical/plasma-technology.html): The heating, current-drive and control technology that runs the plasma.
- [The AI & ML Stack](https://kronosfusionenergy.com/technical/the-ai-ml-stack.html): The machine-learning layers that support design, control and analysis — openly recorded.
- [The Interactive 3D Model Technology](https://kronosfusionenergy.com/technical/the-digital-model-technology.html): The public, physics-grounded 3D model of both machines.
- [The Live In-Browser Simulator](https://kronosfusionenergy.com/technical/the-live-simulator.html): The public tool that runs Kronos's actual physics engine in your browser.
- [The Simulation Stack](https://kronosfusionenergy.com/technical/the-simulation-stack.html): The reduced-order engines and scans that design and validate the machines.

## Engineering & Subsystems
- [Assembly Sequence](https://kronosfusionenergy.com/technical/assembly-sequence.html): The ordered plan for building the machine, piece by piece.
- [Balance of Plant](https://kronosfusionenergy.com/technical/balance-of-plant.html): The conventional plant systems — cooling, power supplies, controls — that surround the fusion core.
- [Compact vs Conventional Fusion](https://kronosfusionenergy.com/technical/compact-vs-conventional.html): Why Kronos pursues small, high-field machines rather than very large ones.
- [Heat-Flux Handling](https://kronosfusionenergy.com/technical/heat-flux.html): Managing the intense heat loads on plasma-facing components.
- [Instrumentation, Control & Safety](https://kronosfusionenergy.com/technical/instrumentation-control.html): The sensors, controls and interlocks that run the machine safely.
- [Interface Control](https://kronosfusionenergy.com/technical/interface-control.html): Managing every boundary where two subsystems meet.
- [Plasma Heating & Current Drive](https://kronosfusionenergy.com/technical/heating-systems.html): How the breeder heats its plasma and sustains its current.
- [Power Conversion](https://kronosfusionenergy.com/technical/power-conversion.html): How each machine turns fusion output into electricity — thermal for the breeder, direct for the burner.
- [Systems Integration](https://kronosfusionenergy.com/technical/systems-integration.html): Managing the interfaces where subsystems meet — the discipline that keeps a complex machine coherent.
- [The Breeder Design Point](https://kronosfusionenergy.com/technical/the-breeder-design-point.html): The full HYPERION operating point in one place, every number from the frozen canon.
- [The Burner Design Point](https://kronosfusionenergy.com/technical/the-burner-design-point.html): The full D–³He burner operating point, across all three product housings.
- [The Burner's Central Cell](https://kronosfusionenergy.com/technical/the-central-cell.html): The long, uniform-field section where most of the burner's fusion happens.
- [The Burner's End Cell](https://kronosfusionenergy.com/technical/the-end-cell.html): The plug-and-expander assembly that confines the plasma and recovers its energy.
- [The Cryogenic System](https://kronosfusionenergy.com/technical/cryogenic-system.html): Keeping superconducting magnets cold enough to work.
- [The D–³He Tandem Mirror (Burner)](https://kronosfusionenergy.com/technical/tandem-mirror.html): The burner is a linear tandem mirror that burns D–³He at 90 keV and converts the result directly to electricity — low-neutron, disruption-free, and modular in length.
- [The General Arrangement](https://kronosfusionenergy.com/technical/general-arrangement.html): How the machine, its plant systems and its building fit together — the top-level layout.
- [The Magnet System](https://kronosfusionenergy.com/technical/magnet-system.html): The full set of coils — toroidal field, poloidal field, central solenoid, and the burner's plugs — and how they work together.
- [The Plug-Density Requirement](https://kronosfusionenergy.com/technical/plug-density-requirement.html): The burner's net power depends on reaching a plug-to-central density ratio near 16. Kronos states this as a requirement, not a result — its most important honest caveat.
- [The Radial Build](https://kronosfusionenergy.com/technical/radial-build.html): The layer-by-layer stack from plasma to magnet — plasma, first wall, blanket, shield, vessel, coil — that every dimension follows from.
- [The Spherical Tokamak (HYPERION)](https://kronosfusionenergy.com/technical/spherical-tokamak.html): HYPERION is a compact spherical tokamak — low aspect ratio, high beta, strongly shaped — engineered to breed tritium and neutrons at Q = 3.424.
- [The Tritium Fuel Cycle](https://kronosfusionenergy.com/technical/fuel-cycle.html): Breeding, extracting, and recycling tritium so the plant fuels itself.
- [The Vacuum System](https://kronosfusionenergy.com/technical/vacuum-system.html): Creating and maintaining the ultra-high vacuum a plasma needs.

## Components & Hardware
- [Breeding Blanket Module](https://kronosfusionenergy.com/technical/blanket-module-component.html): A replaceable segment that breeds tritium and recovers heat.
- [Central Solenoid](https://kronosfusionenergy.com/technical/central-solenoid-component.html): The core magnet that induces and ramps the plasma current.
- [Central-Cell Solenoid](https://kronosfusionenergy.com/technical/central-cell-solenoid.html): The long solenoid string that confines the burner's central plasma.
- [Coil Case & Intercoil Structure](https://kronosfusionenergy.com/technical/coil-case.html): The steel structure that contains a magnet's Lorentz forces.
- [Cryogenic Distribution Line](https://kronosfusionenergy.com/technical/cryoline.html): Insulated lines carrying cryogen to the magnets.
- [Cryoplant Cold Box](https://kronosfusionenergy.com/technical/cold-box.html): The bespoke helium refrigerator that keeps the magnets cold.
- [Cryopump](https://kronosfusionenergy.com/technical/cryopump-component.html): Captures exhaust gas and helium ash on cold surfaces.
- [Cryostat](https://kronosfusionenergy.com/technical/cryostat-component.html): The large vacuum enclosure insulating the cold magnets.
- [DEC Collector Ring](https://kronosfusionenergy.com/technical/dec-collector-ring.html): A biased electrode ring that recovers ion energy as electricity.
- [Diagnostic Port Plug](https://kronosfusionenergy.com/technical/diagnostic-port-plug.html): A shielded plug carrying instruments to the plasma edge.
- [Divertor Cassette](https://kronosfusionenergy.com/technical/divertor-cassette-component.html): A remotely-replaceable unit carrying the divertor targets.
- [Expander / End Tank](https://kronosfusionenergy.com/technical/expander-tank-component.html): Spreads the burner's exhaust plasma for the converter.
- [First-Wall Panel](https://kronosfusionenergy.com/technical/first-wall-panel-component.html): A replaceable armoured tile assembly facing the plasma.
- [Gravity Supports](https://kronosfusionenergy.com/technical/gravity-support-component.html): The structure carrying the machine's weight while allowing thermal motion.
- [Gyrotron](https://kronosfusionenergy.com/technical/gyrotron.html): A high-power microwave source for electron-cyclotron heating.
- [HTS Current Lead](https://kronosfusionenergy.com/technical/hts-current-lead.html): The high-current feedthrough that brings power into the cold magnets.
- [Heat Exchanger](https://kronosfusionenergy.com/technical/heat-exchanger-component.html): Transfers fusion heat to the power cycle while isolating loops.
- [High-Field Plug Coil](https://kronosfusionenergy.com/technical/plug-coil.html): The burner's end-cap magnet that plugs the mirror.
- [Magnetic Pickup Coil](https://kronosfusionenergy.com/technical/magnetic-pickup-coil.html): A simple sensor that measures the plasma's magnetic field.
- [Mirror-Throat Coil](https://kronosfusionenergy.com/technical/mirror-throat-coil.html): The coil that forms the high-field reflection point at each end of the mirror.
- [Neutral-Beam Injector](https://kronosfusionenergy.com/technical/nbi-injector.html): Fires energetic neutral atoms to heat the plasma and drive current.
- [Neutron Shield Block](https://kronosfusionenergy.com/technical/neutron-shield-block.html): Dense shielding that protects the magnets from neutron damage.
- [Pellet Injector](https://kronosfusionenergy.com/technical/pellet-injector-component.html): Fires frozen fuel pellets deep into the plasma.
- [Poloidal-Field Coil Set](https://kronosfusionenergy.com/technical/pf-coil-set.html): Ring coils that shape the plasma and hold its position.
- [Power Supplies & Converters](https://kronosfusionenergy.com/technical/power-supply-converter.html): The bespoke converters that feed magnets and heating.
- [Primary Coolant Pump](https://kronosfusionenergy.com/technical/primary-coolant-pump.html): Circulates coolant to remove fusion heat.
- [Quench Dump Resistor](https://kronosfusionenergy.com/technical/quench-dump-resistor.html): The resistor bank that safely absorbs a magnet's energy in a quench.
- [Quench Dump Switch](https://kronosfusionenergy.com/technical/dump-switch.html): The fast breaker that diverts magnet current into the dump resistor.
- [RF Antenna / Launcher](https://kronosfusionenergy.com/technical/rf-antenna.html): Couples radio-frequency heating power into the plasma.
- [Reflector Liner](https://kronosfusionenergy.com/technical/reflector-liner-component.html): The reflective central-cell liner central to the burner's power balance.
- [Safety-Instrumented Controller](https://kronosfusionenergy.com/technical/sis-controller.html): The independent system that enforces protective interlocks.
- [Superconducting Joint](https://kronosfusionenergy.com/technical/superconducting-joint.html): The low-loss splice between lengths of superconducting tape.
- [Thermal Shield](https://kronosfusionenergy.com/technical/thermal-shield-component.html): Actively-cooled panels intercepting heat before it reaches the magnets.
- [Toroidal-Field Coil](https://kronosfusionenergy.com/technical/tf-coil.html): The D-shaped superconducting coils that make the breeder's main confining field.
- [Tritium Extraction Unit](https://kronosfusionenergy.com/technical/tritium-extraction-unit.html): The system that recovers bred tritium from the blanket.
- [Vacuum-Vessel Sector](https://kronosfusionenergy.com/technical/vacuum-vessel-sector.html): A welded segment of the chamber that holds the plasma vacuum.
- [Vessel Port](https://kronosfusionenergy.com/technical/vessel-port.html): An opening for heating, diagnostics and maintenance access.

## Operations & Commissioning
- [Cold Commissioning](https://kronosfusionenergy.com/technical/cold-commissioning.html): Proving every system works before any plasma exists.
- [Commissioning a Fusion Machine](https://kronosfusionenergy.com/technical/commissioning-overview.html): The staged turn-on from cold systems to first plasma to demonstrated performance.
- [Magnet Commissioning](https://kronosfusionenergy.com/technical/magnet-commissioning.html): Energising the superconducting magnets to full field for the first time.
- [Maintenance Strategy](https://kronosfusionenergy.com/technical/maintenance-strategy.html): Keeping an activated machine running through remote, modular maintenance.
- [Operating for Availability](https://kronosfusionenergy.com/technical/availability-operation.html): Running the plant to maximise uptime — an explicit open study for Kronos.
- [Operating the Fuel Cycle](https://kronosfusionenergy.com/technical/fuel-cycle-operation.html): Breeding, extracting, purifying and re-injecting tritium in steady operation.
- [Performance Demonstration](https://kronosfusionenergy.com/technical/performance-demonstration.html): Sustained operation at the design point, measured against the frozen targets.
- [Power Ascension](https://kronosfusionenergy.com/technical/power-ascension.html): Climbing in steps from first plasma toward the design operating point.
- [Running the Plasma](https://kronosfusionenergy.com/technical/plasma-operation.html): The moment-to-moment task of holding the plasma at its operating point.
- [The First-Plasma Campaign](https://kronosfusionenergy.com/technical/first-plasma-campaign.html): The initial low-power discharges that prove integrated operation.

## Materials & Magnets
- [Copper Alloys in Fusion](https://kronosfusionenergy.com/technical/copper-alloys.html): High-conductivity alloys that carry heat away behind the armour.
- [Cryogenic Structural Alloys](https://kronosfusionenergy.com/technical/structural-alloys.html): High-strength alloys that stay tough at the temperature of superconducting magnets.
- [High-Field Magnets](https://kronosfusionenergy.com/technical/high-field-magnets.html): Why higher magnetic field is the single biggest lever for a compact fusion machine.
- [Magnet Structural Materials](https://kronosfusionenergy.com/technical/magnet-structure.html): The high-strength alloys that hold a magnet together against its own field.
- [Materials Qualification](https://kronosfusionenergy.com/technical/materials-qualification.html): Proving that each material survives its service environment before it goes into a machine.
- [Neutron Damage and Activation](https://kronosfusionenergy.com/technical/neutron-damage-materials.html): How fusion neutrons degrade materials over time, and how Kronos accounts for it.
- [Neutron-Multiplier Materials](https://kronosfusionenergy.com/technical/neutron-multiplier-materials.html): Beryllium and lead used to boost the blanket's neutron count.
- [Plasma-Facing Materials](https://kronosfusionenergy.com/technical/plasma-facing-materials.html): The refractory materials that survive direct exposure to the plasma edge.
- [Quench Protection in Practice](https://kronosfusionenergy.com/technical/quench-protection-detail.html): The detection and energy-dump systems that keep a quenching magnet safe.
- [REBCO HTS Tape](https://kronosfusionenergy.com/technical/rebco-tape.html): The rare-earth barium copper oxide conductor at the heart of Kronos's magnets.
- [Superconducting Magnets for Fusion](https://kronosfusionenergy.com/technical/superconducting-magnets.html): High-temperature superconducting magnets are what make a compact, high-field fusion machine possible. Kronos's magnet study is deposited openly.
- [The Burner Reflector Liner](https://kronosfusionenergy.com/technical/reflector-liner.html): A reflective liner that returns escaping radiation, central to the burner's power balance.
- [The Critical-Current Envelope](https://kronosfusionenergy.com/technical/critical-current-envelope.html): The map of how much current REBCO carries across field and temperature — the magnet's operating boundary.
- [The Magnet Materials Suite](https://kronosfusionenergy.com/technical/the-magnet-materials-suite.html): Every material that goes into a Kronos magnet, and why.
- [The Plasma-Facing Materials Suite](https://kronosfusionenergy.com/technical/the-plasma-facing-suite.html): The armour and heat sinks that survive facing the plasma.
- [The Structural Materials Suite](https://kronosfusionenergy.com/technical/the-structural-materials-suite.html): The alloys that hold the machine together under load and neutrons.
- [The Winding Pack](https://kronosfusionenergy.com/technical/winding-pack.html): The layered stack of superconductor, stabiliser and structure that makes up a magnet coil.
- [Tungsten as Plasma-Facing Armour](https://kronosfusionenergy.com/technical/tungsten-armor.html): The refractory metal of choice for the highest heat-flux surfaces.

## Diagnostics & Measurement
- [Bolometry](https://kronosfusionenergy.com/technical/bolometry.html): Mapping where the plasma radiates its power away.
- [Fibre-Bragg Structural Sensing](https://kronosfusionenergy.com/technical/fiber-bragg-sensing.html): Optical fibres that measure strain and temperature deep inside the magnet structure.
- [Interferometry](https://kronosfusionenergy.com/technical/interferometry.html): Measuring plasma density from how much it delays a probing beam.
- [Magnetic Diagnostics](https://kronosfusionenergy.com/technical/magnetic-diagnostics.html): Coils around the plasma that measure its current, position and shape.
- [Neutron Diagnostics](https://kronosfusionenergy.com/technical/neutron-diagnostics.html): Counting fusion neutrons to measure the fusion power directly.
- [Plasma Diagnostics Overview](https://kronosfusionenergy.com/technical/plasma-diagnostics.html): You cannot put a thermometer in a 100-million-degree plasma; you measure it with light, waves and particles instead.
- [Plasma Spectroscopy](https://kronosfusionenergy.com/technical/spectroscopy.html): Reading the plasma's emitted light to find its impurities and temperature.
- [Thomson Scattering](https://kronosfusionenergy.com/technical/thomson-scattering.html): Firing a laser through the plasma and reading the scattered light to measure temperature and density.

## Products & Applications
- [AEGIS — Defence Installations](https://kronosfusionenergy.com/technical/aegis.html): The mid-scale burner housing for fixed defence installations.
- [Can Fusion Power a Data Centre?](https://kronosfusionenergy.com/technical/can-fusion-power-a-data-center.html): Why the low-neutron burner is a natural fit for hyperscale, point-of-use power.
- [HYPERION — The Breeder](https://kronosfusionenergy.com/technical/hyperion-breeder.html): The neutron-and-tritium machine at the base of the Kronos architecture.
- [MetroVolt — Grid & Data-Centre Power](https://kronosfusionenergy.com/technical/metrovolt.html): The largest burner housing, sized for utility- and data-centre-scale power.
- [Staged Commercialisation](https://kronosfusionenergy.com/technical/staged-commercialization.html): Bringing value to market in stages rather than waiting for the hardest milestone.
- [The Breeder-First Strategy](https://kronosfusionenergy.com/technical/the-breeder-first-strategy.html): Kronos builds the neutron-and-tritium machine first because it has a product to sell before net electricity is proven — a fundamentally different commercial path.
- [The Firm Clean Power Product](https://kronosfusionenergy.com/technical/firm-clean-power-product.html): What Kronos ultimately sells to grids: steady, dispatchable, zero-carbon electricity.
- [The Helium-3 Supply Story](https://kronosfusionenergy.com/technical/helium-3-supply.html): Why helium-3 is strategically valuable, and how the breeder produces it.
- [The Isotope Platform](https://kronosfusionenergy.com/technical/isotope-platform.html): Beyond fuel: the breeder as a source of medical and industrial isotopes.
- [The Kronos Product Family](https://kronosfusionenergy.com/technical/the-product-family.html): One physics platform, several products — from neutrons to grid power.
- [The Neutron Economy](https://kronosfusionenergy.com/technical/the-neutron-economy.html): How the breeder's neutrons create value — tritium, isotopes, and more.
- [The Neutron-Source Product](https://kronosfusionenergy.com/technical/neutron-source-product.html): The breeder as a sellable high-flux neutron source in its own right.

## Applications & Markets
- [Fusion and Space Power](https://kronosfusionenergy.com/technical/space-power-context.html): A long-term prospect — compact fusion and helium-3 have obvious appeal beyond Earth, framed honestly.
- [Fusion as a Tritium Source](https://kronosfusionenergy.com/technical/tritium-supply.html): The breeder's blanket makes tritium the whole fusion industry needs — a product before net electricity.
- [Fusion for Data Centres](https://kronosfusionenergy.com/technical/data-center-power.html): Large, firm, clean power sited close to hyperscale load — a fast-growing demand fusion suits.
- [Fusion for Defence Installations](https://kronosfusionenergy.com/technical/defense-power.html): Resilient, independent, low-signature power for fixed defence sites — the AEGIS housing.
- [Fusion for Desalination](https://kronosfusionenergy.com/technical/desalination-context.html): Firm clean power and heat can drive large-scale water desalination.
- [Fusion for Industrial Heat and Hydrogen](https://kronosfusionenergy.com/technical/industrial-heat-hydrogen.html): Firm high-grade heat and clean electricity can decarbonise industry and make hydrogen.
- [Fusion for Industry](https://kronosfusionenergy.com/technical/fusion-for-industry.html): Firm, clean heat and power to decarbonise heavy industry.
- [Fusion for Medical Isotopes](https://kronosfusionenergy.com/technical/medical-isotopes.html): A high-flux neutron source can produce medical isotopes — another breeder revenue path.
- [Fusion for the Grid](https://kronosfusionenergy.com/technical/grid-scale-power.html): Firm, dispatchable, zero-carbon power to anchor a decarbonised grid — the MetroVolt burner's core market.
- [Helium-3 for Quantum and Medicine](https://kronosfusionenergy.com/technical/helium-3-for-quantum.html): Breeder-produced helium-3 serves quantum computing and medical imaging — a strategic, scarce material.

## Open Science & Publications
- [How to Cite Kronos](https://kronosfusionenergy.com/technical/how-to-cite.html): The correct DOIs and attribution for citing the Kronos deposits in academic or technical work.
- [Intellectual Property](https://kronosfusionenergy.com/technical/intellectual-property.html): Kronos separates open science from proprietary implementation: the design record is open, while the build IP is protected — one patent granted (US 12,009,112) and more pending.
- [The AI, ML & Quantum Record](https://kronosfusionenergy.com/technical/the-ai-quantum-record.html): An open, reproducible record of the AI/ML stack and an honest quantum resource estimate.
- [The Direct Energy Conversion Record](https://kronosfusionenergy.com/technical/the-dec-record.html): The open deposit behind the burner's direct-conversion efficiency.
- [The Five Open Deposits](https://kronosfusionenergy.com/technical/the-open-deposits.html): Kronos deposits its physics openly on Zenodo under CC BY 4.0: breeder, burner, REBCO magnets, direct energy conversion, and the AI/quantum record.
- [The Peer-Review Track](https://kronosfusionenergy.com/technical/peer-review-track.html): Open deposits are the first step; Kronos is pursuing the conventional peer-review path in parallel through arXiv and journal or IAEA venues.
- [The REBCO Magnet Record](https://kronosfusionenergy.com/technical/the-rebco-record.html): The open deposit behind the high-field magnet claims.

## Glossary of Fusion & Plasma Terms
- [AC Loss](https://kronosfusionenergy.com/technical/ac-loss.html): Heat generated in superconductors by changing fields or currents.
- [ALARA Principle](https://kronosfusionenergy.com/technical/alara.html): Keeping radiation exposure As Low As Reasonably Achievable.
- [Acceptance Testing](https://kronosfusionenergy.com/technical/acceptance-testing.html): Proving each component meets spec before it goes into the machine.
- [Accident Analysis](https://kronosfusionenergy.com/technical/accident-analysis.html): Bounding the worst credible events and showing they stay safe.
- [Activation Analysis](https://kronosfusionenergy.com/technical/activation-analysis.html): Computing which radioactive isotopes neutrons create, and how they decay.
- [Activation Inventory](https://kronosfusionenergy.com/technical/activation-inventory.html): The total radioactive material a machine accumulates over life.
- [Activation Products](https://kronosfusionenergy.com/technical/activation-products.html): Radioactive isotopes created when neutrons transmute structural materials.
- [Active Cooling of Components](https://kronosfusionenergy.com/technical/plasma-facing-cooling.html): Continuously removing heat from plasma-facing and structural parts.
- [Actively-Cooled Heat Sinks](https://kronosfusionenergy.com/technical/plasma-facing-heat-sink.html): The cooled structures that carry heat away behind the armour.
- [Adiabatic Invariant](https://kronosfusionenergy.com/technical/adiabatic-invariant.html): A nearly-conserved quantity (the magnetic moment) that underlies mirror confinement.
- [Advanced-Tokamak Scenarios](https://kronosfusionenergy.com/technical/advanced-tokamak.html): High-performance steady-state regimes with strong bootstrap current.
- [Alfvén Eigenmodes](https://kronosfusionenergy.com/technical/alfven-eigenmodes.html): Waves that fast ions can excite, potentially expelling them before they deposit energy.
- [Alfvén Speed](https://kronosfusionenergy.com/technical/alfven-speed.html): The speed of magnetic waves in a plasma, set by field and density.
- [Alfvén Time](https://kronosfusionenergy.com/technical/alfven-time.html): The fast timescale of magnetohydrodynamic motion.
- [Alfvén Wave](https://kronosfusionenergy.com/technical/alfven-wave.html): A fundamental magnetohydrodynamic wave travelling along magnetic field lines.
- [Alpha Channelling](https://kronosfusionenergy.com/technical/alpha-channeling.html): A concept for redirecting fusion-product energy usefully via waves.
- [Alpha Heating](https://kronosfusionenergy.com/technical/alpha-heating.html): Self-heating of the plasma by the energetic helium nuclei that fusion produces.
- [Ambipolar Potential](https://kronosfusionenergy.com/technical/ambipolar-potential.html): An electrostatic potential in a tandem mirror that plugs ion end-losses.
- [Anomaly Detection](https://kronosfusionenergy.com/technical/anomaly-detection.html): Automatically spotting off-normal machine behaviour early.
- [As-Built Metrology](https://kronosfusionenergy.com/technical/metrology-asbuilt.html): Precisely measuring what was actually built versus what was designed.
- [Aspect Ratio (A)](https://kronosfusionenergy.com/technical/aspect-ratio.html): The ratio of a torus's major radius to its minor radius; low A means a 'fat', compact plasma.
- [Auxiliary Power Balance](https://kronosfusionenergy.com/technical/beam-power-balance.html): Accounting for the heating power a machine draws and where it goes.
- [Availability](https://kronosfusionenergy.com/technical/availability.html): The share of time a plant is able to operate; a first-order economic driver.
- [Availability Factor](https://kronosfusionenergy.com/technical/availability-factor.html): The fraction of time a plant is available to generate.
- [Availability Growth](https://kronosfusionenergy.com/technical/availability-growth.html): How plant uptime is expected to improve with operating experience.
- [Availability Targets](https://kronosfusionenergy.com/technical/plant-availability-target.html): The uptime a commercial plant must reach to be viable.
- [Ballooning Modes](https://kronosfusionenergy.com/technical/ballooning-modes.html): Pressure-driven instabilities that balloon out where the field curvature is unfavourable.
- [Banana Orbit](https://kronosfusionenergy.com/technical/banana-orbit.html): The banana-shaped path a trapped particle traces in a tokamak.
- [Base Pressure](https://kronosfusionenergy.com/technical/base-pressure.html): The lowest pressure a vacuum system reaches before operation.
- [Baseload Power](https://kronosfusionenergy.com/technical/baseload-power.html): Steady, always-on generation — a natural fit for firm fusion output.
- [Beam Neutralizer](https://kronosfusionenergy.com/technical/beam-neutralizer.html): Converts accelerated ions into the neutral atoms a beam injects.
- [Beam Shine-Through](https://kronosfusionenergy.com/technical/beam-shinethrough.html): Beam power that passes through the plasma without depositing.
- [Beam-Driven Current](https://kronosfusionenergy.com/technical/beam-driven-current.html): Current driven by injecting energetic neutral beams.
- [Beam-Ion Confinement](https://kronosfusionenergy.com/technical/beam-ion-confinement.html): Keeping injected fast ions confined long enough to heat the plasma.
- [Beam–Target vs Thermonuclear Fusion](https://kronosfusionenergy.com/technical/beam-target-fusion.html): Fusing a beam into a target versus a hot thermal plasma.
- [Beryllium](https://kronosfusionenergy.com/technical/beryllium.html): A light metal used as a neutron multiplier and, historically, a plasma-facing material.
- [Beryllium Handling](https://kronosfusionenergy.com/technical/beryllium-handling.html): Managing the toxicity of beryllium used as a neutron multiplier.
- [Beta Decay](https://kronosfusionenergy.com/technical/beta-decay.html): The radioactive decay by which tritium and activation products relax.
- [Biological Shield](https://kronosfusionenergy.com/technical/biological-shield.html): The thick shielding that protects people from neutron and gamma radiation.
- [Blanket & Divertor Lifetime](https://kronosfusionenergy.com/technical/blanket-lifetime.html): How long in-vessel components last before replacement.
- [Blanket Coverage](https://kronosfusionenergy.com/technical/blanket-coverage.html): How much of the plasma surface the breeding blanket surrounds.
- [Blanket Energy Multiplication](https://kronosfusionenergy.com/technical/energy-multiplication.html): Extra heat released by neutron reactions in the blanket.
- [Blanket Module](https://kronosfusionenergy.com/technical/blanket-module.html): A replaceable segment of the breeding blanket.
- [Blanket Test Modules](https://kronosfusionenergy.com/technical/blanket-testing.html): Testing breeding-blanket concepts before full deployment.
- [Bohm Diffusion](https://kronosfusionenergy.com/technical/bohm-diffusion.html): A pessimistic transport estimate that good confinement beats.
- [Bolometer Array](https://kronosfusionenergy.com/technical/bolometer-array.html): A ring of detectors that maps total radiated power.
- [Bootstrap Alignment](https://kronosfusionenergy.com/technical/plasma-current-alignment.html): Matching the self-driven current to the profile you want.
- [Bootstrap Current](https://kronosfusionenergy.com/technical/bootstrap-current.html): A self-generated plasma current that reduces the external drive a machine needs.
- [Bootstrap Fraction](https://kronosfusionenergy.com/technical/bootstrap-fraction.html): The share of plasma current the plasma generates itself, reducing external drive.
- [Boronisation](https://kronosfusionenergy.com/technical/boronization.html): Coating the walls with boron to reduce oxygen impurities.
- [Branching Ratio](https://kronosfusionenergy.com/technical/branching-ratio.html): The split between a reaction's alternative outcomes, as in D–D.
- [Breeding Blanket](https://kronosfusionenergy.com/technical/blanket.html): The layer that captures fusion neutrons to breed tritium and recover heat.
- [Breeding Material](https://kronosfusionenergy.com/technical/breeding-material.html): The lithium-bearing material in which neutrons breed tritium.
- [Breeding Zone](https://kronosfusionenergy.com/technical/breeding-zone.html): The region of the blanket where tritium is actually bred.
- [Breeding-Ratio Margin](https://kronosfusionenergy.com/technical/tbr-margin.html): The safety margin above breeding self-sufficiency.
- [Bremsstrahlung Monitor](https://kronosfusionenergy.com/technical/bremsstrahlung-monitor.html): Measuring continuum radiation to infer Z_eff.
- [Bremsstrahlung Radiation](https://kronosfusionenergy.com/technical/bremsstrahlung.html): Braking radiation from electrons deflected by ions; an unavoidable plasma energy loss.
- [Burn Control](https://kronosfusionenergy.com/technical/burn-control.html): Regulating fusion power by adjusting fuelling and heating.
- [Burning Plasma](https://kronosfusionenergy.com/technical/burning-plasma.html): A plasma where fusion self-heating is significant — a scientific milestone.
- [Bus-Bars & Feeders](https://kronosfusionenergy.com/technical/bus-bar.html): The heavy conductors that carry current to the magnets.
- [Cable Transposition](https://kronosfusionenergy.com/technical/twist-pitch.html): Twisting conductor strands to equalise current and cut AC loss.
- [Capacity Credit](https://kronosfusionenergy.com/technical/capacity-credit.html): How much firm capacity a generator effectively adds to a grid.
- [Capacity Factor](https://kronosfusionenergy.com/technical/capacity-factor.html): The fraction of nameplate power a plant actually delivers over time.
- [Central Solenoid](https://kronosfusionenergy.com/technical/central-solenoid.html): The core magnet that induces and ramps the plasma current.
- [Ceramic Breeder](https://kronosfusionenergy.com/technical/ceramic-breeder.html): Solid lithium-ceramic pebbles that breed tritium in the blanket.
- [Charge Exchange](https://kronosfusionenergy.com/technical/charge-exchange.html): A neutral and an ion swapping an electron — important for edge losses and diagnostics.
- [Charge-Exchange Spectroscopy](https://kronosfusionenergy.com/technical/charge-exchange-spectroscopy.html): A beam-based diagnostic of ion temperature and rotation.
- [Chemical Sputtering](https://kronosfusionenergy.com/technical/chemical-sputtering.html): Erosion by chemical reactions between plasma and wall.
- [Classical Transport](https://kronosfusionenergy.com/technical/classical-transport.html): The baseline collisional transport across a magnetic field.
- [Clearance Level](https://kronosfusionenergy.com/technical/clearance-level.html): The activity threshold below which material is no longer regulated as radioactive.
- [Coil Subdivision](https://kronosfusionenergy.com/technical/coil-subdivision.html): Splitting a magnet electrically to ease protection.
- [Collective Thomson Scattering](https://kronosfusionenergy.com/technical/collective-scattering.html): Scattering microwaves off density fluctuations to probe ions and fast particles.
- [Collisionality](https://kronosfusionenergy.com/technical/collisionality.html): How often plasma particles collide; it governs which transport regime a plasma is in.
- [Combined Heat and Power](https://kronosfusionenergy.com/technical/combined-heat-power.html): Using a plant's waste heat as well as its electricity.
- [Commissioning](https://kronosfusionenergy.com/technical/commissioning.html): Bringing a built machine to life, system by system, up to first plasma.
- [Commissioning Milestones](https://kronosfusionenergy.com/technical/commissioning-milestones.html): The gated checkpoints from cold systems to demonstrated power.
- [Component Lifetime](https://kronosfusionenergy.com/technical/plasma-facing-lifetime.html): How long plasma-facing and structural parts last before replacement.
- [Component Prototype Testing](https://kronosfusionenergy.com/technical/component-testing.html): Proving key components in test facilities before the full machine.
- [Component Replacement Cycle](https://kronosfusionenergy.com/technical/plasma-facing-replacement.html): The scheduled swap-out of worn in-vessel parts.
- [Condition Monitoring](https://kronosfusionenergy.com/technical/condition-monitoring.html): Continuously watching component health with embedded sensors.
- [Conditioning Discharges](https://kronosfusionenergy.com/technical/wall-conditioning-discharge.html): Low-power discharges that clean and prepare the walls.
- [Conductor Grading](https://kronosfusionenergy.com/technical/coil-grading.html): Tailoring conductor along a coil to match the local field.
- [Confinement Barriers](https://kronosfusionenergy.com/technical/confinement-barriers.html): The nested barriers that keep radioactive material contained.
- [Confinement Power Degradation](https://kronosfusionenergy.com/technical/power-degradation.html): The empirical fact that confinement worsens as heating rises.
- [Confinement Scaling Laws](https://kronosfusionenergy.com/technical/confinement-scaling.html): Empirical formulas (like IPB98) that predict energy confinement time from machine parameters.
- [Connection Length](https://kronosfusionenergy.com/technical/connection-length.html): The distance along a field line from the outer midplane to the divertor target.
- [Contact Dose](https://kronosfusionenergy.com/technical/contact-dose.html): The radiation dose at a component's surface after shutdown.
- [Control-Oriented Modelling](https://kronosfusionenergy.com/technical/plasma-control-modeling.html): Fast plasma models built specifically for control.
- [Controlled Plasma Termination](https://kronosfusionenergy.com/technical/plasma-termination.html): Ending a discharge safely and on purpose.
- [Cool-Down Sequence](https://kronosfusionenergy.com/technical/cooldown-sequence.html): The careful staged chilling of the magnets before operation.
- [Coolant Chemistry & Corrosion Control](https://kronosfusionenergy.com/technical/corrosion-control.html): Keeping coolant loops clean to protect components and control tritium.
- [Coolant Inlet/Outlet Temperatures](https://kronosfusionenergy.com/technical/coolant-temperature.html): The temperature rise of coolant that sets conversion efficiency.
- [Coolant Manifolds](https://kronosfusionenergy.com/technical/coolant-manifold.html): The piping that distributes coolant through the blanket and first wall.
- [Cooling Tower](https://kronosfusionenergy.com/technical/cooling-tower.html): The structure that sheds a thermal plant's waste heat to air.
- [Cooper Pairs](https://kronosfusionenergy.com/technical/cooper-pair.html): The bound electron pairs that carry superconducting current without resistance.
- [Copper Stabiliser](https://kronosfusionenergy.com/technical/stabilizer.html): The conductive layer that carries current if the superconductor quenches.
- [Coulomb Barrier](https://kronosfusionenergy.com/technical/coulomb-barrier.html): The electrostatic repulsion two nuclei must overcome to fuse.
- [Critical & Rare Materials](https://kronosfusionenergy.com/technical/critical-materials.html): Scarce inputs like helium-3 and rare earths — and how Kronos manages them.
- [Critical Current](https://kronosfusionenergy.com/technical/critical-current.html): The maximum current a superconductor carries before it goes resistive.
- [Critical Field](https://kronosfusionenergy.com/technical/critical-field.html): The magnetic field above which a superconductor stops superconducting.
- [Critical Heat Flux](https://kronosfusionenergy.com/technical/critical-heat-flux.html): The heat-flux limit a cooled surface can take before failing.
- [Critical Temperature](https://kronosfusionenergy.com/technical/critical-temperature.html): The temperature below which a material superconducts.
- [Critical-Gradient Transport](https://kronosfusionenergy.com/technical/critical-gradient.html): Turbulence that switches on above a threshold gradient, stiffening profiles.
- [Cross-Field Transport](https://kronosfusionenergy.com/technical/cross-field-transport.html): The leakage of heat and particles across magnetic field lines — what confinement fights.
- [Crowbar & Protection Circuits](https://kronosfusionenergy.com/technical/crowbar-circuit.html): Fast protective circuits that shunt current away from faults.
- [Cryocooler](https://kronosfusionenergy.com/technical/cryocooler.html): A closed-cycle refrigerator cooling smaller cold components directly.
- [Cryogenic Distillation](https://kronosfusionenergy.com/technical/cryogenic-distillation.html): The low-temperature process that separates hydrogen isotopes.
- [Cryogenic Stability](https://kronosfusionenergy.com/technical/cryogenic-stability.html): A magnet's ability to recover from a local heat pulse without quenching.
- [Cryogenic Valve Box](https://kronosfusionenergy.com/technical/valve-box.html): The hub that distributes and controls cryogen flow.
- [Cryopump](https://kronosfusionenergy.com/technical/cryopump.html): A pump that captures gas by freezing it on cold surfaces.
- [Cryopump Regeneration](https://kronosfusionenergy.com/technical/cryopump-regeneration.html): Periodically warming a cryopump to release captured gas.
- [Cryostat](https://kronosfusionenergy.com/technical/cryostat.html): The vacuum enclosure that thermally insulates the cold magnets.
- [CuCrZr Alloy](https://kronosfusionenergy.com/technical/cucrzr.html): A copper-chromium-zirconium alloy used for actively-cooled heat-sink structures.
- [Current Density](https://kronosfusionenergy.com/technical/current-density.html): How much current flows per unit area — high in both plasma and superconductor.
- [Current Drive](https://kronosfusionenergy.com/technical/current-drive.html): Externally sustaining the plasma current using beams or waves, beyond what the plasma self-generates.
- [Current Hole & Profile Control](https://kronosfusionenergy.com/technical/current-hole.html): Extreme current profiles used in advanced scenarios.
- [Current Profile](https://kronosfusionenergy.com/technical/current-profile.html): How the plasma current is distributed across the radius; it shapes stability.
- [Current Quench](https://kronosfusionenergy.com/technical/current-quench.html): The rapid collapse of plasma current during a disruption.
- [Current Ramp-Up and Ramp-Down](https://kronosfusionenergy.com/technical/plasma-current-ramp.html): Safely raising and lowering the plasma current at the start and end of a discharge.
- [Current-Drive Efficiency](https://kronosfusionenergy.com/technical/current-drive-efficiency.html): How much current each watt of external power drives — a key economic lever.
- [Current-Lead Heat Leak](https://kronosfusionenergy.com/technical/current-lead-optimization.html): Minimising the heat the current leads bring into the cold mass.
- [Current-Profile Relaxation](https://kronosfusionenergy.com/technical/current-relaxation.html): The resistive evolution of the current toward a relaxed profile.
- [Current-Sharing Temperature](https://kronosfusionenergy.com/technical/current-sharing-temperature.html): The temperature at which current starts leaving the superconductor for the copper.
- [Curvature & Gradient Drifts](https://kronosfusionenergy.com/technical/curvature-drift.html): Charge-dependent drifts from field curvature and gradients that must be cancelled to confine.
- [DC Link & Energy Buffering](https://kronosfusionenergy.com/technical/dc-link.html): The DC stage that buffers power between conversion stages.
- [Data Acquisition Systems](https://kronosfusionenergy.com/technical/data-acquisition.html): Capturing the flood of diagnostic data a machine produces.
- [Debye Length](https://kronosfusionenergy.com/technical/debye-length.html): The distance over which a plasma screens out electric fields; below it, collective behaviour dominates.
- [Decay Chain](https://kronosfusionenergy.com/technical/decay-chain.html): The sequence by which an activation product relaxes to stability.
- [Decay Heat](https://kronosfusionenergy.com/technical/decay-heat.html): Residual heat from activated materials after shutdown; small for fusion but not zero.
- [Deep Decarbonisation](https://kronosfusionenergy.com/technical/deep-decarbonization.html): Eliminating the last, hardest emissions — where firm clean power is decisive.
- [Defence in Depth](https://kronosfusionenergy.com/technical/defense-in-depth.html): Layered, independent safety measures so no single failure causes harm.
- [Demonstration vs Commercial Plant](https://kronosfusionenergy.com/technical/demonstration-plant.html): The step from proving the concept to selling the product.
- [Density Control](https://kronosfusionenergy.com/technical/density-control.html): Holding the plasma density at its target through fuelling and pumping.
- [Density Peaking](https://kronosfusionenergy.com/technical/density-peaking.html): A centrally-peaked density profile that raises fusion power.
- [Density-Limit Scaling](https://kronosfusionenergy.com/technical/greenwald-scaling.html): How the density limit scales with current and size.
- [Design Basis](https://kronosfusionenergy.com/technical/design-basis.html): The set of conditions a machine is engineered to withstand.
- [Design Integration](https://kronosfusionenergy.com/technical/design-integration.html): Bringing physics, engineering and operations into one coherent design.
- [Detritiation](https://kronosfusionenergy.com/technical/detritiation.html): Removing tritium from gases, water and materials for safety and recovery.
- [Deuterium](https://kronosfusionenergy.com/technical/deuterium.html): A heavy, stable isotope of hydrogen; the base fuel of every Kronos machine.
- [Deuterium from Water](https://kronosfusionenergy.com/technical/deuterium-extraction.html): How the abundant fuel is obtained.
- [Diagnostic Calibration](https://kronosfusionenergy.com/technical/in-vessel-calibration.html): Calibrating instruments so their readings can be trusted.
- [Diagnostic First Mirror](https://kronosfusionenergy.com/technical/first-mirror.html): The exposed optic that optical diagnostics see the plasma through.
- [Diagnostic Integration](https://kronosfusionenergy.com/technical/plasma-diagnostics-integration.html): Fitting dozens of instruments into a shielded, activated machine.
- [Diagnostic Shielding](https://kronosfusionenergy.com/technical/diagnostic-neutron-shielding.html): Protecting sensitive instruments from radiation.
- [Diamagnetic Loop](https://kronosfusionenergy.com/technical/diamagnetic-loop.html): A sensor that measures the plasma's stored energy.
- [Dimensional Control](https://kronosfusionenergy.com/technical/dimensional-control.html): Keeping a large, precise machine within tolerance during fabrication and assembly.
- [Direct Energy Conversion (DEC)](https://kronosfusionenergy.com/technical/direct-energy-conversion.html): Turning charged-particle energy straight into electricity, skipping the steam cycle.
- [Discharge (Shot)](https://kronosfusionenergy.com/technical/shot.html): A single plasma pulse — the unit of tokamak experimentation.
- [Dispatchable Power](https://kronosfusionenergy.com/technical/dispatchable-power.html): Generation that can ramp on demand to follow load.
- [Displacements Per Atom (dpa)](https://kronosfusionenergy.com/technical/dpa.html): A measure of neutron damage — how many times each atom is knocked from its lattice site.
- [Disruption Loads](https://kronosfusionenergy.com/technical/disruption-load.html): The heat and force loads a disruption imposes on the machine.
- [Disruption Mitigation](https://kronosfusionenergy.com/technical/disruption-mitigation.html): Systems that soften an unavoidable disruption to protect the machine.
- [Disruption Prediction](https://kronosfusionenergy.com/technical/disruption-prediction.html): Using models and machine learning to foresee and avoid disruptions.
- [Disruptions](https://kronosfusionenergy.com/technical/disruptions.html): A sudden loss of plasma confinement; avoiding or mitigating them is a central tokamak safety task.
- [District Heating](https://kronosfusionenergy.com/technical/district-heating.html): Using a plant's waste heat to warm nearby communities.
- [Divertor](https://kronosfusionenergy.com/technical/divertor.html): The component that exhausts heat and helium ash from a tokamak while protecting the wall.
- [Divertor Cassette](https://kronosfusionenergy.com/technical/divertor-cassette.html): A remotely-replaceable divertor unit carrying the target plates.
- [Divertor Detachment](https://kronosfusionenergy.com/technical/detachment.html): Cooling the divertor plasma until it 'detaches' from the target, spreading the heat load.
- [Divertor Heat-Flux Width](https://kronosfusionenergy.com/technical/lambda-q.html): The narrow width over which exhaust heat strikes the target.
- [Divertor Momentum Loss](https://kronosfusionenergy.com/technical/momentum-loss-divertor.html): Friction with neutrals that reduces the plasma pressure reaching the target.
- [Divertor Monoblock](https://kronosfusionenergy.com/technical/monoblock.html): The tungsten-and-copper building block of a divertor target.
- [Divertor Pumping](https://kronosfusionenergy.com/technical/divertor-pumping.html): Removing exhaust and helium ash from beneath the divertor.
- [Divertor Strike Point](https://kronosfusionenergy.com/technical/strike-point.html): Where the separatrix meets the divertor target — the focus of the heat load.
- [Dose Mapping](https://kronosfusionenergy.com/technical/dose-mapping.html): Predicting radiation fields to plan maintenance access.
- [Dose Rate](https://kronosfusionenergy.com/technical/dose-rate.html): The radiation-exposure rate that governs access and maintenance timing.
- [Double-Null Configuration](https://kronosfusionenergy.com/technical/double-null.html): A symmetric layout with two X-points that shares the exhaust load.
- [Drift-Wave Turbulence](https://kronosfusionenergy.com/technical/drift-wave.html): Small-scale waves driven by pressure gradients; the main source of anomalous transport.
- [Ductile-Brittle Transition](https://kronosfusionenergy.com/technical/ductile-brittle-transition.html): The temperature below which a steel becomes brittle — raised by irradiation.
- [Duty Cycle](https://kronosfusionenergy.com/technical/duty-cycle.html): The fraction of time a pulsed machine actually produces power.
- [Dynamic Heat Load](https://kronosfusionenergy.com/technical/dynamic-heat-load.html): Extra cryogenic load from AC losses, nuclear heating and ramps.
- [E×B Drift](https://kronosfusionenergy.com/technical/exb-drift.html): A universal plasma drift set by crossed electric and magnetic fields.
- [E×B Shear Suppression](https://kronosfusionenergy.com/technical/exb-shear.html): Sheared flows tearing apart turbulent eddies to improve confinement.
- [ELM Heat Loads](https://kronosfusionenergy.com/technical/elm-heat-load.html): The transient heat pulses ELMs deposit on the divertor.
- [EUROFER Steel](https://kronosfusionenergy.com/technical/eurofer-steel.html): A reduced-activation ferritic-martensitic steel developed for fusion structures.
- [Eddy Currents](https://kronosfusionenergy.com/technical/eddy-current.html): Currents induced in structures by changing magnetic fields.
- [Edge Coherent Modes](https://kronosfusionenergy.com/technical/quasi-coherent-mode.html): Benign edge fluctuations that exhaust energy without large ELMs.
- [Edge Neutral Density](https://kronosfusionenergy.com/technical/neutral-density.html): The population of neutral atoms at the plasma edge.
- [Edge-Localised Modes (ELMs)](https://kronosfusionenergy.com/technical/edge-localized-modes.html): Periodic bursts of energy from the plasma edge that can erode plasma-facing components.
- [Effective Charge (Z_eff)](https://kronosfusionenergy.com/technical/zeff.html): A measure of plasma impurity content; higher Z_eff means more radiation and dilution.
- [Electromagnetic Analysis](https://kronosfusionenergy.com/technical/electromagnetic-analysis.html): Computing the fields, forces and induced currents throughout the machine.
- [Electron Temperature](https://kronosfusionenergy.com/technical/electron-temperature.html): How hot the plasma electrons are; it governs radiation and current drive.
- [Electron-Beam Welding](https://kronosfusionenergy.com/technical/electron-beam-welding.html): A precise, deep welding method for vessel sectors.
- [Electron-Cyclotron Current Drive](https://kronosfusionenergy.com/technical/ec-current-drive.html): Precisely localised current driven by microwaves, used to stabilise modes.
- [Electron-Cyclotron Emission Diagnostic](https://kronosfusionenergy.com/technical/ece-diagnostic.html): Reads the plasma's own microwave glow to map electron temperature.
- [Electron-Cyclotron Heating (ECRH)](https://kronosfusionenergy.com/technical/electron-cyclotron-heating.html): Microwaves tuned to the electron gyrofrequency for precise, localised heating.
- [Electron-Temperature-Gradient Mode](https://kronosfusionenergy.com/technical/etg-mode.html): A fine-scale instability driving electron heat loss.
- [Elongation (κ)](https://kronosfusionenergy.com/technical/elongation.html): How vertically stretched the plasma cross-section is; taller plasmas carry more current and pressure.
- [Embodied Energy](https://kronosfusionenergy.com/technical/embodied-energy.html): The energy locked up in a plant's construction materials.
- [End-of-Life Criteria](https://kronosfusionenergy.com/technical/end-of-life-criteria.html): The limits that decide when a component must be replaced.
- [Energetic-Particle Modes](https://kronosfusionenergy.com/technical/energetic-particle-mode.html): Instabilities driven by fast ions, distinct from Alfvén eigenmodes.
- [Energy Confinement Time (τE)](https://kronosfusionenergy.com/technical/energy-confinement-time.html): How long a plasma retains its heat; longer confinement means less heating power for the same temperature.
- [Energy Return on Investment](https://kronosfusionenergy.com/technical/energy-return-on-investment.html): The energy a plant delivers versus the energy to build and run it.
- [Engineering Breakeven](https://kronosfusionenergy.com/technical/engineering-breakeven.html): A plant producing as much electricity as the whole facility consumes.
- [Environmental Review](https://kronosfusionenergy.com/technical/environmental-review.html): The assessment of a plant's environmental effects for permitting.
- [Equilibrium Reconstruction](https://kronosfusionenergy.com/technical/plasma-shape-reconstruction.html): Computing the plasma's shape and current from magnetic data in real time.
- [Error Fields](https://kronosfusionenergy.com/technical/error-field.html): Tiny magnetic imperfections that can seed islands and locked modes.
- [Expander / End Tank](https://kronosfusionenergy.com/technical/expander-tank.html): The region where a mirror's exhaust plasma spreads out before hitting an end wall or converter.
- [External Kink Mode](https://kronosfusionenergy.com/technical/external-kink.html): A current-driven instability that displaces the whole plasma column.
- [Externally Driven Current](https://kronosfusionenergy.com/technical/driven-current.html): The share of plasma current supplied by heating and waves.
- [FLiBe](https://kronosfusionenergy.com/technical/flibe.html): A molten lithium-beryllium fluoride salt used as breeder and coolant.
- [Factor of Safety](https://kronosfusionenergy.com/technical/factor-of-safety.html): The margin between design loads and failure.
- [Factory Fabrication & Modularity](https://kronosfusionenergy.com/technical/factory-fabrication.html): Building modules in factories to speed and de-risk construction.
- [Fast Ions](https://kronosfusionenergy.com/technical/fast-ions.html): Energetic ions from heating or fusion that must stay confined to deposit their energy.
- [Fast Visible Cameras](https://kronosfusionenergy.com/technical/fast-camera.html): High-speed cameras that image plasma events and instabilities.
- [Fast-Ion Critical Energy](https://kronosfusionenergy.com/technical/critical-energy.html): The energy at which fast ions heat ions versus electrons.
- [Fast-Ion Slowing-Down](https://kronosfusionenergy.com/technical/fast-ion-slowing-down.html): How injected fast ions gradually share their energy with the plasma.
- [Fast-Wave Heating](https://kronosfusionenergy.com/technical/fast-wave-heating.html): An ion-cyclotron-range wave used to heat the plasma core.
- [Feedback Stabilisation](https://kronosfusionenergy.com/technical/feedback-stabilization.html): Active coils that sense and cancel a growing instability.
- [Feedforward Control](https://kronosfusionenergy.com/technical/feedforward-control.html): Pre-planned control actions that anticipate a discharge's needs.
- [Ferritic Inserts](https://kronosfusionenergy.com/technical/ferritic-insert.html): Magnetic inserts used to smooth toroidal-field ripple.
- [Field Harmonic Errors](https://kronosfusionenergy.com/technical/harmonic-error.html): Unwanted components of the magnetic field from imperfect coils.
- [Field-Reversed Configuration](https://kronosfusionenergy.com/technical/field-reversed-configuration.html): A compact toroid held together by its own current — an alternative confinement concept.
- [Finite-Larmor-Radius Effects](https://kronosfusionenergy.com/technical/finite-larmor-radius.html): Stabilising effects from a particle's orbit having real size.
- [Firm Power](https://kronosfusionenergy.com/technical/firm-power.html): Always-available generation the grid can count on.
- [First Plasma](https://kronosfusionenergy.com/technical/first-plasma.html): The milestone of a new machine's first successful discharge.
- [First Wall](https://kronosfusionenergy.com/technical/first-wall.html): The plasma-facing surface that takes the reactor's radiation and particle load.
- [First-Mirror Cleaning](https://kronosfusionenergy.com/technical/plasma-facing-first-mirror-cleaning.html): Keeping diagnostic optics clear in an eroding, depositing environment.
- [First-Wall Coverage](https://kronosfusionenergy.com/technical/plasma-facing-first-wall-coverage.html): Ensuring the plasma-facing surface is fully protected.
- [First-Wall Fluence](https://kronosfusionenergy.com/technical/first-wall-fluence.html): Accumulated neutron exposure at the first wall, setting its life.
- [First-Wall Panel](https://kronosfusionenergy.com/technical/first-wall-panel.html): A replaceable armoured tile assembly facing the plasma.
- [First-of-a-Kind vs Nth-of-a-Kind](https://kronosfusionenergy.com/technical/first-of-a-kind.html): How a technology matures from its first build to routine production.
- [Fishbone Instability](https://kronosfusionenergy.com/technical/fishbone-instability.html): A fast-ion-driven mode that can expel energetic particles.
- [Flat-Top Operation](https://kronosfusionenergy.com/technical/flat-top.html): The steady phase of a discharge where fusion conditions are maintained.
- [Fleet Deployment](https://kronosfusionenergy.com/technical/fleet-deployment.html): Scaling from single plants to a fleet — where breeding margin matters.
- [Floating Potential](https://kronosfusionenergy.com/technical/floating-potential.html): The voltage an isolated surface floats to in contact with plasma.
- [Flux Pinning](https://kronosfusionenergy.com/technical/flux-pinning.html): Trapping magnetic flux lines so a superconductor can carry current in high field.
- [Forced vs Planned Outages](https://kronosfusionenergy.com/technical/forced-outage.html): Unscheduled failures versus scheduled maintenance downtime.
- [Forced-Flow Cooling](https://kronosfusionenergy.com/technical/forced-flow-cooling.html): Pumping coolant through the conductor for reliable heat removal.
- [Fracture Toughness](https://kronosfusionenergy.com/technical/fracture-toughness.html): A material's resistance to cracking — degraded by irradiation.
- [Fuel Burn Fraction](https://kronosfusionenergy.com/technical/burn-fraction.html): The share of injected fuel that actually fuses before being exhausted.
- [Fuel Dilution](https://kronosfusionenergy.com/technical/fuel-dilution.html): The reduction in fusion fuel density caused by impurities and helium ash.
- [Fuel Mixture Control](https://kronosfusionenergy.com/technical/fuel-ratio-control.html): Holding the right isotope or D-to-³He ratio for optimum reactivity.
- [Fuel Throughput](https://kronosfusionenergy.com/technical/fuel-throughput.html): The rate fuel must be injected and recycled to sustain the burn.
- [Fuelling Efficiency](https://kronosfusionenergy.com/technical/fueling-efficiency.html): How much injected fuel actually reaches and stays in the plasma.
- [Full-Power Year](https://kronosfusionenergy.com/technical/full-power-year.html): A year of equivalent full-power operation — the unit of accumulated dose.
- [Functionally-Graded Materials](https://kronosfusionenergy.com/technical/functionally-graded-material.html): Materials that transition gradually to bond dissimilar parts.
- [Fusion Cross-Section](https://kronosfusionenergy.com/technical/fusion-cross-section.html): A measure of how likely two nuclei are to fuse at a given energy.
- [Fusion Power Density](https://kronosfusionenergy.com/technical/fusion-power-density.html): Fusion power produced per unit plasma volume — a compactness driver.
- [Fusion Power Monitor](https://kronosfusionenergy.com/technical/diagnostic-neutron-monitor.html): The calibrated neutron measurement that reports fusion power live.
- [Fusion Process Heat](https://kronosfusionenergy.com/technical/process-heat.html): High-grade heat for industrial processes.
- [Fusion Triple Product](https://kronosfusionenergy.com/technical/fusion-triple-product.html): Density × temperature × confinement time — the single figure of merit for fusion performance.
- [Fusion and Energy Storage](https://kronosfusionenergy.com/technical/energy-storage-complement.html): How firm fusion reduces the storage a renewable grid needs.
- [Fusion in a Microgrid](https://kronosfusionenergy.com/technical/microgrid-fusion.html): Compact fusion as the firm anchor of a local microgrid.
- [Fusion's Role in the Energy Transition](https://kronosfusionenergy.com/technical/energy-transition-role.html): Where firm, clean fusion fits in decarbonising the whole system.
- [Fusion-Powered Hydrogen](https://kronosfusionenergy.com/technical/hydrogen-electrolysis.html): Making clean hydrogen with firm fusion electricity.
- [Gamma Heating](https://kronosfusionenergy.com/technical/gamma-heating.html): Heat deposited by gamma rays from neutron reactions.
- [Gas Injection System](https://kronosfusionenergy.com/technical/gas-injection-system.html): The valves and lines that puff gas for fuelling and control.
- [Gas Production in Materials](https://kronosfusionenergy.com/technical/gas-production-neutronics.html): Neutron reactions creating hydrogen and helium gas in structures.
- [Gas Puffing](https://kronosfusionenergy.com/technical/gas-puffing.html): Refuelling and controlling edge density by injecting gas.
- [Gas-Puff Imaging](https://kronosfusionenergy.com/technical/gas-puff-imaging.html): Visualising edge turbulence by lighting it up with a gas puff.
- [Geodesic Acoustic Mode](https://kronosfusionenergy.com/technical/geodesic-acoustic-mode.html): An oscillating branch of zonal flow seen in the plasma edge.
- [Getter Bed](https://kronosfusionenergy.com/technical/getter-bed.html): A material bed that absorbs and stores tritium safely.
- [Gravity Supports](https://kronosfusionenergy.com/technical/gravity-support.html): The structure that carries the machine's weight while allowing thermal movement.
- [Greenwald Density Limit](https://kronosfusionenergy.com/technical/greenwald-density.html): An empirical ceiling on tokamak plasma density set by current and size.
- [Greenwald Fraction](https://kronosfusionenergy.com/technical/greenwald-fraction.html): How close a plasma runs to its empirical density limit.
- [Grid Inertia & Stability](https://kronosfusionenergy.com/technical/grid-inertia.html): The stabilising rotational energy that firm generators provide to a grid.
- [Grid Interconnection](https://kronosfusionenergy.com/technical/grid-interconnection.html): Connecting a plant's output to the electrical grid.
- [Gross Thermal Power](https://kronosfusionenergy.com/technical/gross-thermal-power.html): The total heat a fusion plant produces before conversion.
- [Gross vs Net Electric Power](https://kronosfusionenergy.com/technical/gross-vs-net.html): The difference between what a plant generates and what it exports.
- [Guiding-Center Motion](https://kronosfusionenergy.com/technical/guiding-center.html): The averaged drift of a particle's gyration, the basis of confinement theory.
- [Gyro-Bohm Scaling](https://kronosfusionenergy.com/technical/gyro-bohm-scaling.html): A turbulence scaling in which bigger machines confine relatively better.
- [Gyrofrequency](https://kronosfusionenergy.com/technical/gyrofrequency.html): How fast a charged particle spirals around a field line; the basis of cyclotron heating.
- [Gyrokinetic Simulation](https://kronosfusionenergy.com/technical/gyrokinetics.html): The reduced kinetic theory used to simulate plasma micro-turbulence.
- [Gyrotron Window & Transmission](https://kronosfusionenergy.com/technical/gyrotron-window.html): Getting microwave power from the source into the plasma.
- [H-mode (High-Confinement Mode)](https://kronosfusionenergy.com/technical/h-mode.html): A spontaneous transition to roughly doubled confinement, standard in modern tokamaks.
- [H-mode Power Threshold](https://kronosfusionenergy.com/technical/power-threshold.html): The minimum heating power needed to access high-confinement mode.
- [Halo Currents](https://kronosfusionenergy.com/technical/halo-current.html): Currents that flow through the vessel during disruptions, exerting large forces.
- [Hastelloy Substrate](https://kronosfusionenergy.com/technical/hastelloy.html): A nickel alloy forming the strong substrate of REBCO superconducting tape.
- [Heat Exchanger](https://kronosfusionenergy.com/technical/heat-exchanger.html): Transfers fusion heat from the primary loop to the power cycle.
- [Heat Rejection](https://kronosfusionenergy.com/technical/heat-rejection-system.html): Getting the plant's waste heat to the environment.
- [Heavy Water](https://kronosfusionenergy.com/technical/heavy-water.html): Deuterium-rich water, a source of the fuel.
- [Helium Ash](https://kronosfusionenergy.com/technical/helium-ash.html): The helium produced by fusion, which must be exhausted before it chokes the reaction.
- [Helium Liquefaction](https://kronosfusionenergy.com/technical/helium-liquefaction.html): The refrigeration that produces the liquid helium magnets need.
- [Helium Production in Metals](https://kronosfusionenergy.com/technical/helium-production-metals.html): Neutron reactions generating helium that embrittles structures.
- [Helium-3](https://kronosfusionenergy.com/technical/helium-3.html): A rare, light helium isotope; the burner's fuel and a strategic material.
- [Helium-Cooled Blanket](https://kronosfusionenergy.com/technical/helium-cooled-blanket.html): A blanket cooled by high-pressure helium — chemically inert and tritium-friendly.
- [High-Recycling Divertor](https://kronosfusionenergy.com/technical/high-recycling-divertor.html): A dense, cool divertor regime that precedes detachment.
- [Hoop Stress](https://kronosfusionenergy.com/technical/hoop-stress.html): The outward tension in a magnet coil from its own Lorentz forces.
- [Hot Cell](https://kronosfusionenergy.com/technical/hot-cell.html): A shielded facility for handling and examining activated components.
- [Hot Isostatic Pressing](https://kronosfusionenergy.com/technical/hip-bonding.html): A bonding process that joins plasma-facing armour to heat sinks.
- [Hot-Spot Temperature](https://kronosfusionenergy.com/technical/hot-spot-temperature.html): The peak temperature reached at a quench site, which must stay bounded.
- [How to Read This Library](https://kronosfusionenergy.com/technical/reading-this-library.html): A guide to navigating the Kronos technical library.
- [Hybrid Scenario](https://kronosfusionenergy.com/technical/hybrid-scenario.html): A robust operating regime between standard and fully non-inductive.
- [I-mode](https://kronosfusionenergy.com/technical/i-mode.html): A regime with a hot pedestal but L-mode-like density and no ELMs.
- [Ideal MHD](https://kronosfusionenergy.com/technical/ideal-mhd.html): The zero-resistivity limit used to test a plasma's gross stability.
- [Impurity Seeding](https://kronosfusionenergy.com/technical/impurity-seeding.html): Injecting trace impurities to radiate exhaust power and protect the divertor.
- [In-Service Inspection](https://kronosfusionenergy.com/technical/in-service-inspection.html): Checking component condition during a machine's operating life.
- [In-Vessel Inspection](https://kronosfusionenergy.com/technical/in-vessel-viewing.html): Remotely viewing the vessel interior to assess component condition.
- [In-Vessel Tritium Inventory](https://kronosfusionenergy.com/technical/plasma-facing-inventory.html): Tritium held in the vessel walls, kept low and tracked.
- [Inertial Confinement](https://kronosfusionenergy.com/technical/inertial-confinement.html): Compressing fuel so fast it fuses before it can fly apart; the alternative to magnetic confinement.
- [Infrared Thermography](https://kronosfusionenergy.com/technical/ir-thermography.html): Imaging surface temperatures to map heat loads on components.
- [Insulation Radiation Limit](https://kronosfusionenergy.com/technical/insulation-dose.html): The radiation dose a magnet's electrical insulation can take.
- [Integrated Modelling](https://kronosfusionenergy.com/technical/integrated-modeling.html): Coupling many physics models to simulate a whole discharge.
- [Interchange Instability](https://kronosfusionenergy.com/technical/interchange-instability.html): A pressure-driven flute-like mode in unfavourable curvature, controlled by minimum-B shaping.
- [Interlock Logic](https://kronosfusionenergy.com/technical/interlock-logic.html): The rules that force the machine to a safe state on fault.
- [Internal Inductance](https://kronosfusionenergy.com/technical/internal-inductance.html): A measure of how peaked the plasma current profile is.
- [Internal Transport Barrier](https://kronosfusionenergy.com/technical/internal-transport-barrier.html): A core region of quenched turbulence and steep gradients that raises performance.
- [Intrinsic Rotation](https://kronosfusionenergy.com/technical/intrinsic-rotation.html): Plasma rotation that arises without external torque.
- [Ion Charge States](https://kronosfusionenergy.com/technical/charge-state.html): How many electrons an impurity ion has lost — it drives radiation.
- [Ion Pump](https://kronosfusionenergy.com/technical/ion-pump.html): A pump that captures gas by ionising it, for clean ultra-high vacuum.
- [Ion Sound Speed](https://kronosfusionenergy.com/technical/ion-sound-speed.html): The speed of pressure waves in a plasma, important at the edge.
- [Ion Temperature](https://kronosfusionenergy.com/technical/ion-temperature.html): How hot the fuel ions are; the temperature that drives fusion reactions.
- [Ion-Cyclotron Heating (ICRH)](https://kronosfusionenergy.com/technical/ion-cyclotron-heating.html): Radio waves tuned to the ion gyrofrequency that heat plasma ions.
- [Ion-Temperature-Gradient Mode](https://kronosfusionenergy.com/technical/itg-mode.html): A key micro-instability driving ion heat transport.
- [Ionization](https://kronosfusionenergy.com/technical/ionization.html): Stripping electrons from atoms to form plasma — the process that fuels the edge.
- [Irradiation Creep](https://kronosfusionenergy.com/technical/irradiation-creep.html): Slow deformation of materials under stress and neutron flux.
- [Irradiation Hardening](https://kronosfusionenergy.com/technical/irradiation-hardening.html): Neutron damage making structural metals stronger but less ductile.
- [Islanding & Black Start](https://kronosfusionenergy.com/technical/islanding.html): Running independently of the grid — valuable for resilience.
- [Isotope Separation](https://kronosfusionenergy.com/technical/isotope-separation.html): Sorting hydrogen isotopes to recycle fuel and recover products.
- [Joint Resistance](https://kronosfusionenergy.com/technical/joint-resistance.html): The small residual resistance at superconducting splices, a heat source.
- [Joule–Thomson Cooling](https://kronosfusionenergy.com/technical/joule-thomson-effect.html): Cooling a gas by expanding it — a stage of helium refrigeration.
- [Kilo-Electron-Volt (keV)](https://kronosfusionenergy.com/technical/kev-unit.html): The energy unit for plasma temperature; 1 keV is about 11.6 million kelvin.
- [Kink Instability](https://kronosfusionenergy.com/technical/kink-instability.html): A current-driven mode that bends the plasma column; bounded by the safety factor.
- [L-mode (Low-Confinement Mode)](https://kronosfusionenergy.com/technical/l-mode.html): The baseline confinement regime before the H-mode transition.
- [Langmuir Probe](https://kronosfusionenergy.com/technical/langmuir-probe.html): A simple biased electrode that measures edge density and temperature.
- [Larmor Radius](https://kronosfusionenergy.com/technical/larmor-radius.html): The radius of a charged particle's spiral around a magnetic field line.
- [Lead-Lithium (PbLi)](https://kronosfusionenergy.com/technical/lead-lithium.html): A liquid metal that breeds tritium and can cool the blanket.
- [Limiter](https://kronosfusionenergy.com/technical/limiter.html): A solid surface that defines the plasma edge in machines without a divertor.
- [Liquid-Lithium Wall](https://kronosfusionenergy.com/technical/liquid-lithium-wall.html): A lithium plasma-facing surface that can improve confinement and handle heat.
- [Liquid-Metal Divertor](https://kronosfusionenergy.com/technical/liquid-metal-divertor.html): A self-healing divertor surface of flowing liquid metal.
- [Liquid-Metal MHD Effects](https://kronosfusionenergy.com/technical/mhd-pressure-drop.html): How magnetic fields resist the flow of conducting coolants.
- [Lithium Blanket](https://kronosfusionenergy.com/technical/lithium-blanket.html): A blanket using lithium to breed tritium and recover heat.
- [Lithium-6 and Enrichment](https://kronosfusionenergy.com/technical/lithium-6.html): The lithium isotope that breeds tritium most effectively.
- [Load-Following Capability](https://kronosfusionenergy.com/technical/load-following.html): Adjusting output to match changing demand.
- [Locked Mode](https://kronosfusionenergy.com/technical/locked-mode.html): A magnetic island that stops rotating and can trigger a disruption.
- [Long-Lead Items](https://kronosfusionenergy.com/technical/long-lead-items.html): Components whose procurement time paces the build.
- [Loop Voltage](https://kronosfusionenergy.com/technical/loop-voltage.html): The toroidal voltage that drives and sustains ohmic plasma current.
- [Lorentz Force](https://kronosfusionenergy.com/technical/lorentz-force.html): The force on a current in a magnetic field; what tries to tear a magnet apart.
- [Loss-of-Coolant Analysis](https://kronosfusionenergy.com/technical/loss-of-coolant.html): Checking that losing coolant cannot cause a fusion accident.
- [Loss-of-Vacuum Analysis](https://kronosfusionenergy.com/technical/loss-of-vacuum.html): Assessing the benign consequences of a vacuum breach.
- [Low-Activation Steel (RAFM)](https://kronosfusionenergy.com/technical/low-activation-steel.html): Reduced-activation ferritic-martensitic steel designed to decay quickly after irradiation.
- [Lower-Hybrid Waves](https://kronosfusionenergy.com/technical/lower-hybrid-wave.html): Waves especially effective at driving off-axis plasma current.
- [L–H Transition](https://kronosfusionenergy.com/technical/l-h-transition.html): The sudden jump from low- to high-confinement mode above a power threshold.
- [MARFE](https://kronosfusionenergy.com/technical/marfe.html): A radiating edge instability that can precede a density-limit disruption.
- [Mach Probe](https://kronosfusionenergy.com/technical/mach-probe.html): An edge probe that measures plasma flow speed.
- [Machine Protection System](https://kronosfusionenergy.com/technical/machine-protection.html): The system that shields the hardware from damaging plasma events.
- [Magnet Charging Time](https://kronosfusionenergy.com/technical/magnet-charging-time.html): How long it takes to energise the magnets to full field.
- [Magnet Cold Mass](https://kronosfusionenergy.com/technical/cold-mass.html): The assembly of coils and structure held at cryogenic temperature.
- [Magnet Cool-Down Time](https://kronosfusionenergy.com/technical/cooldown-time.html): The weeks it takes to chill the magnets before operation.
- [Magnet Fatigue](https://kronosfusionenergy.com/technical/magnet-fatigue.html): Cyclic stress that can crack a magnet over many pulses — the burner's binding magnet gate.
- [Magnet Feeder System](https://kronosfusionenergy.com/technical/magnet-feeder-system.html): The routes that bring power and cryogen to the coils.
- [Magnet Insulation Materials](https://kronosfusionenergy.com/technical/kapton-alternatives.html): The organic and inorganic insulators that electrically isolate windings.
- [Magnet Quench Protection](https://kronosfusionenergy.com/technical/quench-protection.html): Systems that safely dump a superconducting magnet's energy if it loses superconductivity.
- [Magnet Radiation Dose Limit](https://kronosfusionenergy.com/technical/magnet-dose-limit.html): The neutron dose the superconducting magnets can tolerate.
- [Magnet Ramp Rate](https://kronosfusionenergy.com/technical/ramp-rate.html): How fast a magnet can be charged without losing stability.
- [Magnetic Axis](https://kronosfusionenergy.com/technical/magnetic-axis.html): The innermost magnetic surface — the centre of the nested flux surfaces.
- [Magnetic Confinement](https://kronosfusionenergy.com/technical/magnetic-confinement.html): Using magnetic fields to hold a hot plasma away from material walls.
- [Magnetic Field Quality](https://kronosfusionenergy.com/technical/field-quality.html): How closely the real field matches the ideal design field.
- [Magnetic Flux Surface](https://kronosfusionenergy.com/technical/magnetic-flux-surface.html): A nested surface traced by field lines, on which pressure is constant.
- [Magnetic Helicity](https://kronosfusionenergy.com/technical/magnetic-helicity.html): A conserved measure of magnetic-field twist and linkage.
- [Magnetic Island](https://kronosfusionenergy.com/technical/magnetic-island.html): A region where field lines reconnect into a closed chain, short-circuiting confinement.
- [Magnetic Pressure](https://kronosfusionenergy.com/technical/magnetic-pressure.html): The outward push of a magnetic field — what confines plasma and stresses magnets.
- [Magnetic Reconnection](https://kronosfusionenergy.com/technical/magnetic-reconnection.html): The rearrangement of field-line topology that releases magnetic energy, e.g. in sawteeth.
- [Magnetic Shear](https://kronosfusionenergy.com/technical/magnetic-shear.html): How the field-line pitch changes across the plasma; it stabilises turbulence and modes.
- [Magnetic Shielding](https://kronosfusionenergy.com/technical/magnetic-shielding.html): Ferromagnetic or active shielding that contains stray fields.
- [Magnetic Well](https://kronosfusionenergy.com/technical/magnetic-well.html): A field minimum at the plasma centre that provides MHD stability in mirrors.
- [Magneto-Inertial Fusion](https://kronosfusionenergy.com/technical/magneto-inertial.html): A hybrid that magnetises fuel and then compresses it.
- [Magnetohydrodynamic (MHD) Stability](https://kronosfusionenergy.com/technical/mhd-stability.html): The study of large-scale plasma instabilities that can degrade or end confinement.
- [Maintainability](https://kronosfusionenergy.com/technical/maintainability.html): Designing a machine so it can actually be maintained.
- [Maintenance Windows](https://kronosfusionenergy.com/technical/maintenance-window.html): The planned outages that bound plant availability.
- [Mass Defect](https://kronosfusionenergy.com/technical/mass-defect.html): The tiny mass converted to energy in every fusion reaction.
- [Massive Gas Injection](https://kronosfusionenergy.com/technical/massive-gas-injection.html): Firing a large gas puff to radiate a disruption's energy safely.
- [Material Abundance](https://kronosfusionenergy.com/technical/material-abundance.html): How common a technology's key materials are — mostly favourable for fusion.
- [Material Recyclability](https://kronosfusionenergy.com/technical/recyclability.html): Reusing decommissioned materials once they clear activity limits.
- [Maxwellian Distribution](https://kronosfusionenergy.com/technical/maxwellian-distribution.html): The bell-curve of particle speeds in a plasma at thermal equilibrium.
- [Mean Time Between Failures](https://kronosfusionenergy.com/technical/mean-time-between-failures.html): How long, on average, components run before failing.
- [Mean Time to Repair](https://kronosfusionenergy.com/technical/mean-time-to-repair.html): How quickly a failed component can be restored — driven by remote handling.
- [Mega-Ampere (MA)](https://kronosfusionenergy.com/technical/mega-ampere.html): The unit of the large currents a tokamak plasma carries.
- [Mega-Electron-Volt (MeV)](https://kronosfusionenergy.com/technical/mev-unit.html): The energy unit for fusion reaction products and neutrons.
- [Micro-Instabilities](https://kronosfusionenergy.com/technical/micro-instability.html): Small-scale instabilities that drive turbulent transport.
- [Minimum Quench Energy](https://kronosfusionenergy.com/technical/minimum-quench-energy.html): The smallest disturbance that will tip a magnet into a quench.
- [Minimum-B Configuration](https://kronosfusionenergy.com/technical/minimum-b-configuration.html): A field geometry with a central magnetic well that stabilises a mirror plasma.
- [Minority-Ion Heating](https://kronosfusionenergy.com/technical/minority-heating.html): Efficiently heating the bulk by resonantly heating a minority ion species.
- [Mirror Ratio](https://kronosfusionenergy.com/technical/mirror-ratio.html): The field-strength ratio between a mirror's throat and its centre; it sets how well particles are trapped.
- [Mobilisable Inventory](https://kronosfusionenergy.com/technical/mobilizable-inventory.html): The radioactive material that could actually be released in an accident.
- [Mode Conversion](https://kronosfusionenergy.com/technical/mode-conversion.html): One plasma wave transforming into another, exploited for heating.
- [Model-Predictive Control](https://kronosfusionenergy.com/technical/model-predictive-control.html): Control that plans ahead using a model of the plasma.
- [Momentum Transport](https://kronosfusionenergy.com/technical/momentum-transport.html): How plasma rotation is transported and sustained.
- [Monte-Carlo Neutronics](https://kronosfusionenergy.com/technical/monte-carlo-neutronics.html): Simulating neutron transport by tracking many random histories.
- [Motional Stark Effect Diagnostic](https://kronosfusionenergy.com/technical/motional-stark-effect.html): A beam diagnostic that measures the internal magnetic-field pitch.
- [Multi-Layer Insulation](https://kronosfusionenergy.com/technical/mli-insulation.html): Reflective layers that block radiant heat in the cryostat.
- [Negative-Ion Beam Source](https://kronosfusionenergy.com/technical/negative-ion-source.html): The ion source that enables high-energy neutral beams.
- [Neoclassical Conductivity](https://kronosfusionenergy.com/technical/neoclassical-conductivity.html): Trapped particles reducing a plasma's effective conductivity.
- [Neoclassical Tearing Mode (NTM)](https://kronosfusionenergy.com/technical/neoclassical-tearing-mode.html): A pressure-driven magnetic island that can cap achievable beta.
- [Neoclassical Transport](https://kronosfusionenergy.com/technical/neoclassical-transport.html): The irreducible, geometry-driven leakage of heat and particles across the field.
- [Net Electric Power](https://kronosfusionenergy.com/technical/net-electric-power.html): Electricity delivered to the grid after the plant's own consumption.
- [Net Energy Gain](https://kronosfusionenergy.com/technical/net-energy-gain.html): More energy out than in — the milestone the whole field aims at.
- [Neutral Beam Injection (NBI)](https://kronosfusionenergy.com/technical/neutral-beam-injection.html): Firing energetic neutral atoms into the plasma to heat it and drive current.
- [Neutral Recycling](https://kronosfusionenergy.com/technical/neutral-recycling.html): The cycle of plasma neutralising at the wall and re-entering as gas.
- [Neutron Activation Analysis](https://kronosfusionenergy.com/technical/neutron-activation-analysis.html): Using neutrons to identify materials — a breeder-enabled capability.
- [Neutron Camera](https://kronosfusionenergy.com/technical/neutron-camera.html): Images where fusion is happening by mapping neutron emission.
- [Neutron Capture](https://kronosfusionenergy.com/technical/neutron-capture.html): A nucleus absorbing a neutron — the reaction that breeds tritium and activates materials.
- [Neutron Energy Spectrum](https://kronosfusionenergy.com/technical/neutron-spectrum.html): The distribution of neutron energies a machine produces — it sets damage and breeding.
- [Neutron Fluence](https://kronosfusionenergy.com/technical/fluence.html): Accumulated neutron exposure over a component's life.
- [Neutron Flux](https://kronosfusionenergy.com/technical/neutron-flux.html): How many neutrons cross a unit area per second — the driver of damage and breeding.
- [Neutron Moderation](https://kronosfusionenergy.com/technical/neutron-moderation.html): Slowing fast neutrons so they can breed tritium or be captured.
- [Neutron Multiplication](https://kronosfusionenergy.com/technical/neutron-multiplication-factor.html): Boosting neutron count in the blanket to ensure breeding self-sufficiency.
- [Neutron Multiplier](https://kronosfusionenergy.com/technical/neutron-multiplier.html): A blanket material that multiplies neutrons to raise the tritium breeding ratio.
- [Neutron Reflection & Albedo](https://kronosfusionenergy.com/technical/neutron-albedo.html): Neutrons scattered back from shielding, affecting the neutron budget.
- [Neutron Shielding](https://kronosfusionenergy.com/technical/shielding.html): Material layers that slow and absorb fusion neutrons to protect magnets and people.
- [Neutron Spectrometer](https://kronosfusionenergy.com/technical/neutron-spectrometer.html): Measures the neutron energy spectrum to diagnose the plasma.
- [Neutron Streaming](https://kronosfusionenergy.com/technical/neutron-streaming.html): Neutrons leaking through gaps and penetrations in the shield.
- [Neutron Wall Load](https://kronosfusionenergy.com/technical/neutron-wall-load.html): Fusion-neutron power per unit first-wall area — a lifetime driver.
- [Neutron Wall Loading](https://kronosfusionenergy.com/technical/neutron-wall-loading.html): The neutron power per unit area striking the first wall.
- [Neutron Yield](https://kronosfusionenergy.com/technical/neutron-yield.html): How many neutrons a reaction or plasma produces.
- [Neutron Yield Monitors](https://kronosfusionenergy.com/technical/neutron-yield-monitor.html): Instruments that continuously measure fusion power via neutrons.
- [Neutronics Optimisation](https://kronosfusionenergy.com/technical/neutronics-optimization.html): Arranging the blanket and shield to breed and protect at once.
- [No-Insulation Coils](https://kronosfusionenergy.com/technical/no-insulation-coil.html): A REBCO winding technique that improves stability by omitting turn insulation.
- [Non-Destructive Examination (NDE)](https://kronosfusionenergy.com/technical/non-destructive-examination.html): Inspecting welds and components without damaging them.
- [Normal Zone](https://kronosfusionenergy.com/technical/normal-zone.html): The resistive region that appears when a superconductor quenches.
- [Nuclear Binding Energy](https://kronosfusionenergy.com/technical/binding-energy.html): The energy holding a nucleus together — and the source of fusion's power.
- [Nuclear Data Libraries](https://kronosfusionenergy.com/technical/nuclear-data-library.html): The evaluated cross-sections that neutronics calculations depend on.
- [Nuclear Heating (KERMA)](https://kronosfusionenergy.com/technical/kerma.html): The heat neutrons and gammas deposit throughout the machine.
- [Nuclear Heating Rate](https://kronosfusionenergy.com/technical/neutron-heating-rate.html): How fast neutrons and gammas deposit heat in each component.
- [Nuclear Heating of the Magnets](https://kronosfusionenergy.com/technical/nuclear-heating-of-magnets.html): Neutron and gamma heat deposited in the cold coils, which the shield limits.
- [Occupational Safety](https://kronosfusionenergy.com/technical/occupational-safety.html): Protecting the workers who build and run the plant.
- [Ohmic Confinement](https://kronosfusionenergy.com/technical/ohmic-confinement.html): The confinement regime of an unheated, ohmically-driven plasma.
- [Ohmic Heating](https://kronosfusionenergy.com/technical/ohmic-heating.html): Heating from the plasma's own resistance to its current — effective only while the plasma is cool.
- [On-Axis Safety Factor (q0)](https://kronosfusionenergy.com/technical/safety-factor-on-axis.html): The safety factor at the plasma centre, key to sawtooth behaviour.
- [Operating Modes](https://kronosfusionenergy.com/technical/operating-modes.html): The distinct states a plant runs in, from standby to full power.
- [Operating Scenario](https://kronosfusionenergy.com/technical/plasma-startup-scenario.html): The planned trajectory of current, density and heating through a discharge.
- [Operational Envelope](https://kronosfusionenergy.com/technical/operational-envelope.html): The range of conditions a machine can safely and stably run within.
- [Operator Training & Simulators](https://kronosfusionenergy.com/technical/operator-training-simulator.html): Training operators on a simulator before running the real machine.
- [Optimising the Neutron Economy](https://kronosfusionenergy.com/technical/neutron-economy-optimization.html): Making the most of every fusion neutron — breed, capture, or protect.
- [Orbit Loss](https://kronosfusionenergy.com/technical/orbit-loss.html): Fast particles lost because their orbits intersect the wall.
- [Outgassing](https://kronosfusionenergy.com/technical/outgassing.html): Gas slowly released from surfaces that vacuum systems must remove.
- [Oxide-Dispersion-Strengthened Steel](https://kronosfusionenergy.com/technical/ods-steel.html): A steel reinforced with fine oxides for high-temperature, high-dose service.
- [PFC Qualification Testing](https://kronosfusionenergy.com/technical/plasma-facing-qualification.html): High-heat-flux testing that proves plasma-facing components.
- [Palladium Membrane](https://kronosfusionenergy.com/technical/palladium-membrane.html): A membrane that purifies hydrogen isotopes by selective permeation.
- [Pancake Winding](https://kronosfusionenergy.com/technical/pancake-winding.html): Building a coil from flat, stacked disc windings.
- [Parallel Heat Flux](https://kronosfusionenergy.com/technical/parallel-heat-flux.html): The intense heat flowing along field lines toward the divertor.
- [Parasitic (House) Load](https://kronosfusionenergy.com/technical/parasitic-load.html): The power a plant consumes to run itself.
- [Particle Pinch](https://kronosfusionenergy.com/technical/particle-pinch.html): An inward transport that peaks the density profile, aiding fusion power.
- [Passive Safety](https://kronosfusionenergy.com/technical/passive-safety.html): Safety that relies on physics, not active systems.
- [Peeling-Ballooning Modes](https://kronosfusionenergy.com/technical/peeling-ballooning.html): The edge instabilities that trigger ELMs.
- [Pellet Ablation](https://kronosfusionenergy.com/technical/pellet-ablation.html): How an injected fuel pellet evaporates into the plasma.
- [Pellet Fuelling](https://kronosfusionenergy.com/technical/fueling-pellet.html): Injecting frozen fuel pellets to refuel the plasma core efficiently.
- [Penetration Shielding](https://kronosfusionenergy.com/technical/penetration-shielding.html): Protecting the gaps where ports pierce the shield.
- [Pfirsch–Schlüter Current](https://kronosfusionenergy.com/technical/pfirsch-schluter-current.html): A pressure-driven current that flows to maintain equilibrium.
- [Physical Sputtering](https://kronosfusionenergy.com/technical/physical-sputtering.html): Wall atoms knocked out by the momentum of impacting ions.
- [Plant & Plasma Control System](https://kronosfusionenergy.com/technical/plasma-control-system.html): The integrated system that runs the machine safely and reproducibly.
- [Plant Availability](https://kronosfusionenergy.com/technical/plant-availability.html): The fraction of time a plant can operate — a first-order commercial driver Kronos flags as open.
- [Plant Electrical System](https://kronosfusionenergy.com/technical/plant-electrical-system.html): The high-power electrical backbone of the facility.
- [Plant Lifetime](https://kronosfusionenergy.com/technical/plant-lifetime.html): The design service life of the whole facility.
- [Plant Start-Up & Shutdown](https://kronosfusionenergy.com/technical/plant-startup-shutdown.html): The orchestrated sequences that bring the whole plant on and offline.
- [Plant Thermal Efficiency](https://kronosfusionenergy.com/technical/plant-thermal-efficiency.html): How much of the gross thermal power becomes net electricity.
- [Plasma](https://kronosfusionenergy.com/technical/plasma.html): The fourth state of matter — an ionised gas of free electrons and ions that responds to magnetic fields.
- [Plasma Actuators](https://kronosfusionenergy.com/technical/actuator.html): The knobs — heating, fuelling, current drive, coils — a control system turns.
- [Plasma Arcing](https://kronosfusionenergy.com/technical/unipolar-arc.html): Electrical arcs at the wall that damage surfaces and shed impurities.
- [Plasma Beta (β) and Beta-N](https://kronosfusionenergy.com/technical/plasma-beta.html): The ratio of plasma pressure to magnetic pressure; higher beta means a more economical machine.
- [Plasma Breakdown](https://kronosfusionenergy.com/technical/plasma-breakdown.html): The initial ionisation that turns fill gas into a conducting plasma at start-up.
- [Plasma Current](https://kronosfusionenergy.com/technical/plasma-current.html): The toroidal current a tokamak drives through its plasma; it confines and shapes the plasma.
- [Plasma Density](https://kronosfusionenergy.com/technical/plasma-density.html): How many fuel nuclei occupy each cubic metre; fusion power scales with its square.
- [Plasma Diamagnetism](https://kronosfusionenergy.com/technical/plasma-diamagnetism.html): The plasma's tendency to weaken the field within it, sensed for stored energy.
- [Plasma Frequency](https://kronosfusionenergy.com/technical/plasma-frequency.html): The natural oscillation rate of a plasma's electrons; it sets which waves can propagate.
- [Plasma Parameters](https://kronosfusionenergy.com/technical/plasma-parameters.html): The set of numbers that define a plasma's state.
- [Plasma Performance](https://kronosfusionenergy.com/technical/plasma-performance.html): The overall measure of how well a plasma does its job.
- [Plasma Position & Shape Control](https://kronosfusionenergy.com/technical/plasma-position-control.html): Real-time control of where the plasma sits and how it is shaped.
- [Plasma Purity](https://kronosfusionenergy.com/technical/plasma-purity.html): Keeping the fuel clean of impurities that radiate and dilute.
- [Plasma Rotation](https://kronosfusionenergy.com/technical/plasma-rotation.html): Bulk flow of the plasma that stabilises certain instabilities.
- [Plasma Self-Organisation](https://kronosfusionenergy.com/technical/self-organization.html): Turbulent plasmas settling into ordered magnetic states on their own.
- [Plasma Shaping](https://kronosfusionenergy.com/technical/plasma-shaping.html): Elongation and triangularity together define the plasma's cross-section and its stability.
- [Plasma State Estimation](https://kronosfusionenergy.com/technical/plasma-state-estimation.html): Fusing diagnostics into a real-time picture of the plasma.
- [Plasma Volume](https://kronosfusionenergy.com/technical/plasma-volume.html): The volume of confined plasma — it scales the total fusion power.
- [Plasma-Facing Armour](https://kronosfusionenergy.com/technical/plasma-facing-armor.html): The sacrificial surface layer that takes erosion and heat.
- [Plasma-Facing Components](https://kronosfusionenergy.com/technical/plasma-facing-component.html): The armoured surfaces that directly face the plasma.
- [Polarimetry](https://kronosfusionenergy.com/technical/polarimetry.html): Measuring internal current from the rotation of light's polarisation.
- [Poloidal Beta](https://kronosfusionenergy.com/technical/beta-poloidal.html): A pressure ratio using only the poloidal field; it correlates with bootstrap current.
- [Poloidal Field](https://kronosfusionenergy.com/technical/poloidal-field.html): The field that runs the short way around, produced mainly by the plasma current.
- [Ports & Port Plugs](https://kronosfusionenergy.com/technical/port-plug.html): Vessel openings that carry heating, diagnostics and maintenance access.
- [Power Decay Length](https://kronosfusionenergy.com/technical/power-decay-length.html): How quickly exhaust power falls off across the scrape-off layer.
- [Power Quality](https://kronosfusionenergy.com/technical/power-quality.html): Delivering clean, stable electricity to the grid.
- [Power-Handling Capability](https://kronosfusionenergy.com/technical/power-handling.html): How much power the exhaust systems can take before limits.
- [Primary Coolant](https://kronosfusionenergy.com/technical/primary-coolant.html): The fluid that carries fusion heat out of the blanket and first wall.
- [Private-Flux Region](https://kronosfusionenergy.com/technical/private-flux-region.html): The area between the divertor legs, below the X-point.
- [Profile Stiffness](https://kronosfusionenergy.com/technical/profile-stiffness.html): The resistance of temperature profiles to being pushed past critical gradients.
- [Prompt vs Delayed Radiation](https://kronosfusionenergy.com/technical/prompt-radiation.html): Radiation during operation versus after shutdown.
- [Proton–Boron-11 (p–¹¹B)](https://kronosfusionenergy.com/technical/proton-boron-11.html): The truly aneutronic reaction — a long-term research endpoint, not the Kronos baseline.
- [Public Dose Limits](https://kronosfusionenergy.com/technical/dose-to-public.html): Keeping any public radiation exposure far below regulatory limits.
- [Public Engagement](https://kronosfusionenergy.com/technical/public-engagement.html): Explaining fusion openly to the communities it will serve.
- [Pulse Length & Flat-Top Duration](https://kronosfusionenergy.com/technical/plasma-current-flat-top-duration.html): How long a machine can hold its operating point.
- [Quasineutrality](https://kronosfusionenergy.com/technical/quasineutrality.html): A plasma's tendency to keep equal ion and electron densities over any appreciable scale.
- [Quench Detection](https://kronosfusionenergy.com/technical/quench-detection.html): Sensing the onset of a magnet quench fast enough to protect it.
- [Quench Propagation](https://kronosfusionenergy.com/technical/quench-propagation.html): How a normal zone spreads through a quenching magnet.
- [Quench Protection Heaters](https://kronosfusionenergy.com/technical/quench-heater.html): Devices that spread a quench deliberately to protect the coil.
- [Quiescent H-mode](https://kronosfusionenergy.com/technical/qh-mode.html): A high-confinement regime without large ELMs.
- [RAMI Analysis](https://kronosfusionenergy.com/technical/rami.html): Reliability, Availability, Maintainability and Inspectability — the discipline behind uptime.
- [REBCO High-Temperature Superconductor](https://kronosfusionenergy.com/technical/rebco.html): Rare-earth barium copper oxide tape that carries huge currents at high field; the enabling magnet material.
- [RF Current Drive](https://kronosfusionenergy.com/technical/rf-current-drive.html): Driving plasma current with radio-frequency and microwave waves.
- [Radial Electric Field](https://kronosfusionenergy.com/technical/radial-electric-field.html): An internal electric field that shears flows and improves confinement.
- [Radiated Power Fraction](https://kronosfusionenergy.com/technical/radiated-power-fraction.html): The share of exhaust power radiated before it reaches the divertor targets.
- [Radiation Embrittlement](https://kronosfusionenergy.com/technical/radiation-embrittlement.html): Loss of ductility in materials under neutron irradiation.
- [Radiation Swelling](https://kronosfusionenergy.com/technical/radiation-swelling.html): Neutron-induced volume growth in structural materials.
- [Radiation-Hard Insulation](https://kronosfusionenergy.com/technical/radiation-hard-insulation.html): Magnet insulation formulated to survive neutron dose.
- [Radiative Collapse](https://kronosfusionenergy.com/technical/radiative-collapse.html): A runaway cooling of the plasma edge that can end a discharge.
- [Radiative Divertor](https://kronosfusionenergy.com/technical/radiative-divertor.html): A divertor operated to radiate most of its heat before it reaches the targets.
- [Radioactive Waste Processing](https://kronosfusionenergy.com/technical/waste-processing.html): Preparing decommissioned material for disposal or recycling.
- [Radiological Source Term](https://kronosfusionenergy.com/technical/source-term.html): The inventory of radioactive material that bounds worst-case releases.
- [Rational Surface](https://kronosfusionenergy.com/technical/rational-surface.html): A flux surface where the safety factor is a simple fraction — where islands can grow.
- [React-and-Wind vs Wind-and-React](https://kronosfusionenergy.com/technical/react-and-wind.html): Two ways to form REBCO into a coil, trading handling against performance.
- [Reaction Q-Value](https://kronosfusionenergy.com/technical/q-value.html): The energy released by a fusion reaction.
- [Reactivity](https://kronosfusionenergy.com/technical/reactivity.html): The temperature-averaged fusion reaction rate for a fuel.
- [Reactor–Plant Integration](https://kronosfusionenergy.com/technical/plant-integration.html): Coupling the fusion core to a working power plant.
- [Real-Time Control Network](https://kronosfusionenergy.com/technical/real-time-network.html): The low-latency network that carries control signals.
- [Real-Time Plasma Control](https://kronosfusionenergy.com/technical/real-time-control.html): The fast feedback system that keeps the plasma stable millisecond to millisecond.
- [Recirculating Power](https://kronosfusionenergy.com/technical/recirculating-power.html): The share of a plant's output it must feed back to run itself.
- [Recombination](https://kronosfusionenergy.com/technical/recombination.html): Ions and electrons recombining into neutrals — key to divertor detachment.
- [Rectifiers & Inverters](https://kronosfusionenergy.com/technical/rectifier-inverter.html): Power electronics that convert between AC and DC for magnets and drives.
- [Recycling Coefficient](https://kronosfusionenergy.com/technical/recycling-coefficient.html): How much plasma returns from the wall as neutral gas.
- [Redeposition](https://kronosfusionenergy.com/technical/redeposition.html): Eroded material settling elsewhere on the wall.
- [Redundancy & Fault Tolerance](https://kronosfusionenergy.com/technical/redundancy.html): Duplicated systems that keep a machine safe when something fails.
- [Reference Operating Scenario](https://kronosfusionenergy.com/technical/plasma-scenario.html): The canonical discharge a machine is designed to run.
- [Reflectometry](https://kronosfusionenergy.com/technical/reflectometry.html): Bouncing microwaves off density layers to profile the plasma.
- [Refurbishment](https://kronosfusionenergy.com/technical/refurbishment.html): Periodic renewal of components to extend plant life.
- [Reliability Engineering](https://kronosfusionenergy.com/technical/reliability-engineering.html): Designing systems to fail rarely and safely.
- [Remote Handling](https://kronosfusionenergy.com/technical/remote-handling.html): Robotic maintenance of activated components no human can approach.
- [Replacement Downtime](https://kronosfusionenergy.com/technical/plasma-facing-replacement-time.html): How long swapping in-vessel components takes — a key availability driver.
- [Residual Gas Analysis](https://kronosfusionenergy.com/technical/residual-gas-analyzer.html): Identifying the gases present in the vacuum.
- [Resistive Ballooning Modes](https://kronosfusionenergy.com/technical/resistive-ballooning.html): Pressure-driven edge modes including resistivity.
- [Resistive Diffusion Time](https://kronosfusionenergy.com/technical/resistive-time.html): The timescale on which the current profile relaxes.
- [Resistive MHD](https://kronosfusionenergy.com/technical/resistive-mhd.html): MHD with finite resistivity, allowing tearing and reconnection.
- [Resistive Wall Mode](https://kronosfusionenergy.com/technical/resistive-wall-mode.html): A slow instability that grows when a conducting wall's stabilisation leaks away resistively.
- [Resonant Magnetic Perturbations](https://kronosfusionenergy.com/technical/resonant-magnetic-perturbation.html): Deliberately applied 3D fields used to control ELMs.
- [Reversed Magnetic Shear](https://kronosfusionenergy.com/technical/reversed-shear.html): A q-profile that dips in the core, capable of forming an internal transport barrier.
- [Reversed-Field Pinch](https://kronosfusionenergy.com/technical/reversed-field-pinch.html): A toroidal concept with a self-organised, reversed edge field.
- [Ripple Loss](https://kronosfusionenergy.com/technical/ripple-loss.html): Fast-particle losses caused by toroidal-field ripple.
- [Rogowski Coil](https://kronosfusionenergy.com/technical/rogowski-coil.html): A loop that measures total plasma current.
- [Rotation Shear](https://kronosfusionenergy.com/technical/plasma-rotation-shear.html): Differential plasma rotation that tears apart turbulence.
- [Rotational Transform](https://kronosfusionenergy.com/technical/rotational-transform.html): How much a field line rotates poloidally per toroidal circuit — the inverse of the safety factor.
- [Roughing Pump](https://kronosfusionenergy.com/technical/roughing-pump.html): The backing pump that establishes rough vacuum first.
- [Runaway Electrons](https://kronosfusionenergy.com/technical/runaway-electrons.html): Electrons accelerated to high energy during disruptions that can damage the wall.
- [Runaway-Electron Mitigation](https://kronosfusionenergy.com/technical/runaway-mitigation.html): Preventing or dissipating the electron beam a disruption can create.
- [SCADA & Plant Control](https://kronosfusionenergy.com/technical/scada-system.html): The supervisory system that monitors and controls plant systems.
- [SOL Power Width](https://kronosfusionenergy.com/technical/scrape-off-width.html): The narrow layer that determines divertor heat concentration.
- [Safety Factor (q)](https://kronosfusionenergy.com/technical/safety-factor.html): A measure of magnetic field-line pitch that governs large-scale plasma stability.
- [Sawtooth Oscillations](https://kronosfusionenergy.com/technical/sawtooth-oscillation.html): Periodic core temperature crashes from a central instability; usually benign but can trigger other modes.
- [Sawtooth Period & Inversion Radius](https://kronosfusionenergy.com/technical/sawtooth-period.html): The timing and extent of core sawtooth crashes.
- [Scaling to Commercial Products](https://kronosfusionenergy.com/technical/scale-up.html): Moving from prototype to the AEGIS and MetroVolt products.
- [Scenario Development](https://kronosfusionenergy.com/technical/plasma-scenario-development.html): Designing and refining the discharge recipes a machine will run.
- [Scientific Breakeven](https://kronosfusionenergy.com/technical/scientific-breakeven.html): Fusion power equalling heating power — Q = 1, the plasma-physics milestone.
- [Scrape-Off Layer](https://kronosfusionenergy.com/technical/scrape-off-layer.html): The thin edge region where field lines lead to the divertor rather than closing on themselves.
- [Scrape-Off-Layer Flows](https://kronosfusionenergy.com/technical/sol-flow.html): Plasma flows along open field lines that redistribute heat and particles.
- [Second Stability](https://kronosfusionenergy.com/technical/second-stability.html): A high-pressure regime accessible past the first ballooning limit.
- [Secondary Containment](https://kronosfusionenergy.com/technical/secondary-containment.html): Nested barriers that keep tritium from escaping.
- [Self-Cooled Liquid-Metal Blanket](https://kronosfusionenergy.com/technical/self-cooled-blanket.html): A blanket where the breeding liquid metal is also the coolant.
- [Separatrix](https://kronosfusionenergy.com/technical/separatrix.html): The boundary between confined, closed flux surfaces and open scrape-off field lines.
- [Shattered Pellet Injection](https://kronosfusionenergy.com/technical/shattered-pellet.html): Shattering a frozen pellet into the plasma to mitigate disruptions.
- [Shielding Effectiveness](https://kronosfusionenergy.com/technical/shielding-effectiveness.html): How well a shield attenuates neutrons and gammas.
- [Shielding vs Breeding Trade](https://kronosfusionenergy.com/technical/shielding-blanket.html): Balancing neutron shielding against tritium breeding in the blanket.
- [Single-Null Configuration](https://kronosfusionenergy.com/technical/single-null.html): A divertor layout with one X-point, the common power-plant choice.
- [Single-Pass Absorption](https://kronosfusionenergy.com/technical/single-pass-absorption.html): Whether heating power is absorbed in one pass through the plasma.
- [Site Selection](https://kronosfusionenergy.com/technical/site-selection.html): Choosing where to build, balancing grid, cooling, and access.
- [Sloshing Ions](https://kronosfusionenergy.com/technical/sloshing-ions.html): Anisotropic ions injected at an angle to build a mirror's confining potential.
- [Snowflake Divertor](https://kronosfusionenergy.com/technical/snowflake-divertor.html): An advanced divertor geometry that spreads heat over more surface.
- [Soft X-Ray Diagnostics](https://kronosfusionenergy.com/technical/soft-x-ray-array.html): Detector arrays that image core fluctuations and instabilities.
- [Specific Power](https://kronosfusionenergy.com/technical/specific-power.html): Power produced per unit mass or volume — a compactness metric.
- [Spheromak](https://kronosfusionenergy.com/technical/spheromak.html): A self-organised plasma ring formed with minimal external coils.
- [Spitzer Resistivity](https://kronosfusionenergy.com/technical/spitzer-resistivity.html): The classical electrical resistivity of a hot plasma, falling steeply with temperature.
- [Sputtering](https://kronosfusionenergy.com/technical/sputtering.html): Erosion of wall material by ion bombardment.
- [Stack Monitoring](https://kronosfusionenergy.com/technical/stack-monitoring.html): Continuous measurement of any tritium released to the environment.
- [Standardisation](https://kronosfusionenergy.com/technical/standardization.html): Repeating proven designs to cut cost and risk.
- [Start-Up Assist Heating](https://kronosfusionenergy.com/technical/plasma-startup-assist.html): Using RF power to help break down and ramp the plasma.
- [Static Heat Load](https://kronosfusionenergy.com/technical/static-heat-load.html): The steady heat leak into the cold mass the cryoplant must remove.
- [Steerable Microwave Launcher](https://kronosfusionenergy.com/technical/steerable-launcher.html): An aimed mirror that directs heating to a chosen location.
- [Stellarator](https://kronosfusionenergy.com/technical/stellarator.html): A toroidal device that confines plasma with external coils alone, needing no plasma current.
- [Stored Magnetic Energy](https://kronosfusionenergy.com/technical/stored-magnetic-energy.html): The energy held in the magnets, which quench protection must safely remove.
- [Stored Plasma Energy](https://kronosfusionenergy.com/technical/stored-plasma-energy.html): The thermal energy in the plasma, released during a disruption.
- [Stray & Fringe Fields](https://kronosfusionenergy.com/technical/stray-field.html): Magnetic fields extending beyond the machine that must be managed.
- [Structural Analysis (FEA)](https://kronosfusionenergy.com/technical/structural-analysis.html): Computing stresses to prove components survive their loads.
- [Sub-Divertor Plenum](https://kronosfusionenergy.com/technical/sub-divertor.html): The pumped volume beneath the divertor that controls neutrals.
- [Super-X Divertor](https://kronosfusionenergy.com/technical/super-x-divertor.html): A long-legged divertor that increases connection length to ease heat load.
- [Supercritical Helium Cooling](https://kronosfusionenergy.com/technical/supercritical-helium.html): Cooling magnets with helium above its critical point for stable single-phase flow.
- [Surface Castellation](https://kronosfusionenergy.com/technical/castellation.html): Grooves in plasma-facing armour that relieve thermal stress.
- [Surface Heat Flux](https://kronosfusionenergy.com/technical/plasma-facing-heat-flux.html): The heat per area a plasma-facing surface must shed.
- [Synchrotron Radiation](https://kronosfusionenergy.com/technical/synchrotron-radiation.html): Radiation from electrons gyrating in the magnetic field; significant at high temperature and field.
- [Taylor Relaxation](https://kronosfusionenergy.com/technical/taylor-relaxation.html): A plasma relaxing to a minimum-energy state at fixed helicity.
- [Tearing Modes](https://kronosfusionenergy.com/technical/tearing-mode.html): Resistive instabilities that tear magnetic surfaces into islands, degrading confinement.
- [Technology Readiness](https://kronosfusionenergy.com/technical/technology-readiness.html): Judging how mature each subsystem is, honestly.
- [Temperature Margin](https://kronosfusionenergy.com/technical/temperature-margin.html): How much a magnet can warm before it starts to quench.
- [Tesla (T)](https://kronosfusionenergy.com/technical/tesla-unit.html): The unit of magnetic field strength; higher tesla means a more compact machine.
- [The Beta Limit](https://kronosfusionenergy.com/technical/beta-limit.html): The maximum plasma pressure a magnetic configuration can stably hold.
- [The Breeder and Burner Deposits](https://kronosfusionenergy.com/technical/the-two-deposits.html): The two core open records behind the two machines.
- [The Carnot Limit](https://kronosfusionenergy.com/technical/carnot-efficiency.html): The thermodynamic ceiling on any heat engine — and why direct conversion is attractive.
- [The Density Limit](https://kronosfusionenergy.com/technical/density-limit.html): The maximum density before radiative collapse or disruption.
- [The Deployment Roadmap](https://kronosfusionenergy.com/technical/deployment-roadmap.html): The staged path from design study to fielded products.
- [The Detachment Front](https://kronosfusionenergy.com/technical/detachment-front.html): The boundary where the divertor plasma lifts off the target.
- [The Diagnostic Suite](https://kronosfusionenergy.com/technical/plasma-diagnostics-suite.html): The full ensemble of instruments that together measure the plasma state.
- [The Digital Thread](https://kronosfusionenergy.com/technical/digital-thread.html): Linking design, as-built and operating data across a component's life.
- [The Frozen Design Point](https://kronosfusionenergy.com/technical/the-frozen-point.html): The single canonical operating point behind the whole record.
- [The Fuelling System](https://kronosfusionenergy.com/technical/plasma-fueling-system.html): The combined gas and pellet systems that feed the plasma.
- [The Fusion Neutron Source](https://kronosfusionenergy.com/technical/fusion-neutron-source.html): A fusion machine used chiefly to produce neutrons — exactly the breeder's role.
- [The Fusion Power Plant](https://kronosfusionenergy.com/technical/fusion-power-plant.html): The complete facility — core, plant, controls — that turns fusion into power.
- [The Fusion Supply Chain](https://kronosfusionenergy.com/technical/supply-chain.html): The vendors and long-lead items a plant depends on.
- [The Gamow Factor](https://kronosfusionenergy.com/technical/gamow-factor.html): The quantum-tunnelling probability that lets nuclei fuse below the classical barrier.
- [The H98 Confinement Factor](https://kronosfusionenergy.com/technical/energy-confinement-scaling-h98.html): A number expressing confinement relative to the standard H-mode scaling.
- [The Heating Mix](https://kronosfusionenergy.com/technical/plasma-heating-mix.html): Combining beams and RF to heat, drive current and control the plasma.
- [The Integrated Power Plant](https://kronosfusionenergy.com/technical/the-power-plant-system.html): How all the systems combine into a generating facility.
- [The Isotope Effect](https://kronosfusionenergy.com/technical/isotope-effect.html): The empirical improvement in confinement with heavier hydrogen isotopes.
- [The Kronos Programme](https://kronosfusionenergy.com/technical/program-roadmap.html): The overall arc from open design record to fielded fusion products.
- [The Kronos Public Record](https://kronosfusionenergy.com/technical/the-kronos-record.html): Everything Kronos puts in the open — deposits, model, simulator, library.
- [The Kronos Thesis](https://kronosfusionenergy.com/technical/the-kronos-thesis.html): Match fuel to purpose, sell materials first, and prove it in the open.
- [The Licensing Pathway](https://kronosfusionenergy.com/technical/licensing-pathway.html): The regulatory route from design to permitted construction.
- [The Magnet Test Coil](https://kronosfusionenergy.com/technical/magnet-test-coil.html): A representative coil built and powered to prove the magnet technology.
- [The Magnetic Configuration](https://kronosfusionenergy.com/technical/magnetic-configuration.html): The overall arrangement of fields that confines a given machine.
- [The Magnetic Mirror](https://kronosfusionenergy.com/technical/magnetic-mirror.html): A linear trap that reflects charged particles between regions of strong field.
- [The Meissner Effect](https://kronosfusionenergy.com/technical/meissner-effect.html): A superconductor expelling magnetic field — the signature of the superconducting state.
- [The Mercier Criterion](https://kronosfusionenergy.com/technical/mercier-criterion.html): A local stability condition for pressure-driven interchange modes.
- [The No-Evacuation Goal](https://kronosfusionenergy.com/technical/no-evacuation.html): Designing so no off-site emergency response is ever needed.
- [The No-Wall Beta Limit](https://kronosfusionenergy.com/technical/no-wall-limit.html): The pressure limit without help from a conducting wall.
- [The Open, Checkable Model](https://kronosfusionenergy.com/technical/the-open-model.html): Why Kronos publishes a model anyone can inspect and run.
- [The Operating Point](https://kronosfusionenergy.com/technical/operating-point.html): The specific set of conditions a machine is designed to run at.
- [The Pedestal](https://kronosfusionenergy.com/technical/pedestal.html): The steep-gradient edge region of an H-mode plasma that sets overall performance.
- [The Plant Simulator](https://kronosfusionenergy.com/technical/plant-simulator.html): A full-plant model used for design, control and training.
- [The Plasma Sheath](https://kronosfusionenergy.com/technical/plasma-sheath.html): The thin charged layer where plasma meets a solid surface.
- [The Plug Demonstration](https://kronosfusionenergy.com/technical/plug-demonstration.html): The experiment that must prove the burner's plug-density requirement.
- [The Prototype Plant](https://kronosfusionenergy.com/technical/prototype-plant.html): The first integrated machine that demonstrates the whole system.
- [The Safety Analysis Report](https://kronosfusionenergy.com/technical/safety-analysis-report.html): The document that demonstrates a plant is safe to license.
- [The Shafranov Shift](https://kronosfusionenergy.com/technical/shafranov-shift.html): The outward shift of a plasma's core as its pressure rises.
- [The Tritium Plant](https://kronosfusionenergy.com/technical/tritium-plant.html): The integrated facility that processes all of the plant's tritium.
- [The q-Profile](https://kronosfusionenergy.com/technical/q-profile.html): The radial profile of the safety factor, central to advanced operating scenarios.
- [Thermal & Functional Coatings](https://kronosfusionenergy.com/technical/thermal-barrier-coating.html): Thin coatings that protect surfaces or control their properties.
- [Thermal (Steam) Cycle](https://kronosfusionenergy.com/technical/steam-cycle.html): The conventional heat-to-electricity cycle the breeder uses and the burner avoids.
- [Thermal Anchoring](https://kronosfusionenergy.com/technical/thermal-anchoring.html): Heat-sinking wires and supports to intercept heat leaks.
- [Thermal Barrier](https://kronosfusionenergy.com/technical/thermal-barrier.html): A potential dip that thermally isolates a tandem mirror's plug electrons.
- [Thermal Cycling](https://kronosfusionenergy.com/technical/thermal-cycling.html): Repeated heating and cooling that fatigues components.
- [Thermal Diffusivity](https://kronosfusionenergy.com/technical/thermal-diffusivity.html): How fast heat diffuses across the field — the quantity confinement minimises.
- [Thermal Equilibrium](https://kronosfusionenergy.com/technical/thermal-equilibrium.html): When plasma species share a common temperature via collisions.
- [Thermal Fatigue](https://kronosfusionenergy.com/technical/thermal-fatigue.html): Cracking from repeated thermal expansion and contraction.
- [Thermal Gradients](https://kronosfusionenergy.com/technical/thermal-gradient.html): Steep temperature changes that drive heat flow and stress.
- [Thermal Quench](https://kronosfusionenergy.com/technical/thermal-quench.html): The sudden loss of plasma thermal energy that starts a disruption.
- [Thermal Shield](https://kronosfusionenergy.com/technical/thermal-shield.html): An actively-cooled shield that intercepts heat before it reaches the cold magnets.
- [Thermal Storage & Load Following](https://kronosfusionenergy.com/technical/thermal-storage.html): Storing heat to help a plant follow demand.
- [Thermal Stress](https://kronosfusionenergy.com/technical/thermal-stress.html): Stress from temperature gradients across a component.
- [Thermal-Conductivity Degradation](https://kronosfusionenergy.com/technical/thermal-conductivity-degradation.html): Neutron damage lowering a material's ability to conduct heat.
- [Thermal-Cycle Efficiency](https://kronosfusionenergy.com/technical/thermal-efficiency.html): How efficiently the breeder turns heat into electricity.
- [Thermal-Hydraulics](https://kronosfusionenergy.com/technical/thermal-hydraulics.html): The coupled heat-and-flow analysis that keeps components cool.
- [Theta and Screw Pinches](https://kronosfusionenergy.com/technical/theta-pinch.html): Early pinch concepts that compress plasma with induced currents.
- [Thyristor & IGBT Converters](https://kronosfusionenergy.com/technical/thyristor.html): The switching devices at the heart of high-power converters.
- [Tokamak](https://kronosfusionenergy.com/technical/tokamak.html): A toroidal magnetic-confinement device; the most-studied fusion configuration.
- [Tokamak Start-Up](https://kronosfusionenergy.com/technical/tokamak-startup.html): Ramping a tokamak from breakdown to its flat-top operating current.
- [Tolerance Stack-Up](https://kronosfusionenergy.com/technical/tolerance-stackup.html): How individual part tolerances accumulate across an assembly.
- [Toroidal Beta](https://kronosfusionenergy.com/technical/plasma-beta-toroidal.html): Plasma pressure compared to the toroidal-field pressure.
- [Toroidal Field](https://kronosfusionenergy.com/technical/toroidal-field.html): The main confining field that runs the long way around a tokamak.
- [Toroidal-Field Coil](https://kronosfusionenergy.com/technical/toroidal-field-coil.html): The D-shaped coils that generate the main confining field.
- [Toroidal-Field Ripple](https://kronosfusionenergy.com/technical/toroidal-field-ripple.html): Small field variations between discrete coils that can lose fast ions.
- [Transmutation](https://kronosfusionenergy.com/technical/transmutation.html): Neutron reactions changing one element into another — useful for breeding, unwanted in structure.
- [Transmutation Rate](https://kronosfusionenergy.com/technical/transmutation-rate.html): How fast neutrons change a material's composition.
- [Transport Barrier](https://kronosfusionenergy.com/technical/transport-barrier.html): A region of suppressed turbulence and steep gradients that boosts confinement.
- [Trapped Particles](https://kronosfusionenergy.com/technical/trapped-particles.html): Particles that bounce back and forth in the field's low-field region, tracing banana orbits.
- [Trapped-Electron Mode](https://kronosfusionenergy.com/technical/tem-mode.html): A micro-instability driven by trapped electrons.
- [Triangularity (δ)](https://kronosfusionenergy.com/technical/triangularity.html): How D-shaped or reverse-D the plasma is; negative triangularity can suppress edge instabilities.
- [Tritium](https://kronosfusionenergy.com/technical/tritium.html): A radioactive hydrogen isotope, bred in the breeder blanket rather than mined.
- [Tritium Accountancy](https://kronosfusionenergy.com/technical/tritium-accountancy.html): Tracking every gram of tritium for safety and regulation.
- [Tritium Breeding Ratio (TBR)](https://kronosfusionenergy.com/technical/tritium-breeding.html): Tritium atoms bred per tritium atom burned; must exceed 1 for self-sufficiency.
- [Tritium Burn Efficiency](https://kronosfusionenergy.com/technical/tritium-burn-efficiency.html): How efficiently injected tritium is consumed — it drives inventory needs.
- [Tritium Co-Deposition](https://kronosfusionenergy.com/technical/codeposition.html): Tritium trapped in redeposited wall layers — a tritium-inventory concern.
- [Tritium Doubling Time](https://kronosfusionenergy.com/technical/doubling-time.html): How long a breeder takes to produce a second plant's startup inventory.
- [Tritium Inventory](https://kronosfusionenergy.com/technical/tritium-inventory.html): The amount of tritium held in a plant at any time — kept low for safety and accountancy.
- [Tritium Inventory Minimisation](https://kronosfusionenergy.com/technical/inventory-minimization.html): Keeping the resident tritium as low as possible for safety.
- [Tritium Material Balance](https://kronosfusionenergy.com/technical/material-balance.html): Closing the books on tritium produced, burned and stored.
- [Tritium Monitoring](https://kronosfusionenergy.com/technical/tritium-monitoring.html): Continuously measuring tritium in air, water and effluent.
- [Tritium Permeation](https://kronosfusionenergy.com/technical/tritium-permeation.html): The tendency of tritium to diffuse through hot metals, requiring barriers.
- [Tritium Release Pathways](https://kronosfusionenergy.com/technical/tritium-release-pathways.html): The routes tritium could take, all engineered against.
- [Tritium Retention in Materials](https://kronosfusionenergy.com/technical/tritium-retention.html): Tritium trapped in walls that must be limited and recovered.
- [Tritium Self-Sufficiency](https://kronosfusionenergy.com/technical/tritium-self-sufficiency.html): A plant breeding at least as much tritium as it burns.
- [Tritium Storage Bed](https://kronosfusionenergy.com/technical/storage-bed.html): The controlled bed where tritium inventory is held.
- [Tungsten Divertor](https://kronosfusionenergy.com/technical/tungsten-divertor.html): Tungsten armour on the divertor targets, chosen for its heat tolerance.
- [Tungsten Recrystallisation](https://kronosfusionenergy.com/technical/tungsten-recrystallization.html): High-temperature change in tungsten armour that can embrittle it.
- [Turbine-Generator](https://kronosfusionenergy.com/technical/turbine-generator.html): The rotating machine that turns the breeder's heat into electricity.
- [Turboexpander](https://kronosfusionenergy.com/technical/turboexpander.html): A turbine stage that cools helium in the cryoplant.
- [Turbomolecular Pump](https://kronosfusionenergy.com/technical/turbomolecular-pump.html): A high-speed rotor pump for high vacuum.
- [Turbulent (Anomalous) Transport](https://kronosfusionenergy.com/technical/turbulent-transport.html): Micro-turbulence that leaks heat faster than collisions alone; the main confinement-limiter.
- [Vacuum Conductance](https://kronosfusionenergy.com/technical/conductance.html): How readily gas flows through a vacuum system — it limits pumping.
- [Vacuum Leak Detection](https://kronosfusionenergy.com/technical/leak-detection.html): Finding and fixing leaks that would spoil the vacuum.
- [Vacuum Pumping Speed](https://kronosfusionenergy.com/technical/pumping-speed.html): How fast the vacuum system removes gas and helium ash.
- [Vacuum Vessel](https://kronosfusionenergy.com/technical/vacuum-vessel.html): The sealed chamber that holds the plasma's ultra-high vacuum.
- [Vapour Shielding](https://kronosfusionenergy.com/technical/vapor-shielding.html): A protective vapour cloud that forms under extreme transient heat.
- [Venetian-Blind Collector](https://kronosfusionenergy.com/technical/venetian-blind-collector.html): The angled electrode array of a direct energy converter.
- [Vertical Displacement Event (VDE)](https://kronosfusionenergy.com/technical/vertical-displacement-event.html): Loss of vertical position control in an elongated plasma, a disruption pathway.
- [Vertical Stability Control](https://kronosfusionenergy.com/technical/plasma-elongation-control.html): Active feedback that holds an elongated plasma in place.
- [Vessel Bakeout](https://kronosfusionenergy.com/technical/bakeout.html): Heating the vessel to drive off adsorbed gas and reach high vacuum.
- [Visible & UV Spectroscopy](https://kronosfusionenergy.com/technical/visible-spectroscopy.html): Reading visible and ultraviolet lines to monitor impurities and the edge.
- [Volt-Seconds (Flux Swing)](https://kronosfusionenergy.com/technical/volt-seconds.html): The magnetic flux budget the solenoid spends to drive current.
- [Wall Conditioning](https://kronosfusionenergy.com/technical/wall-conditioning.html): Preparing vessel surfaces to control impurities and recycling.
- [Wall Erosion](https://kronosfusionenergy.com/technical/erosion.html): The gradual loss of plasma-facing material over a machine's life.
- [Wall Fuel Inventory](https://kronosfusionenergy.com/technical/wall-inventory.html): Fuel retained in the walls, which must be limited and accounted for.
- [Wall Stabilisation](https://kronosfusionenergy.com/technical/wall-stabilization.html): Using a conducting wall to slow down certain instabilities.
- [Wall-Plug Efficiency](https://kronosfusionenergy.com/technical/wall-plug-efficiency.html): How efficiently a heating or conversion system turns grid power into useful output.
- [Waste Classification](https://kronosfusionenergy.com/technical/waste-classification.html): Sorting decommissioned material by its radioactivity level.
- [Water Detritiation](https://kronosfusionenergy.com/technical/water-detritiation.html): Recovering tritium that ends up in water.
- [Water-Cooled Blanket](https://kronosfusionenergy.com/technical/water-cooled-blanket.html): A blanket concept using pressurised water as coolant.
- [Wave (RF) Heating](https://kronosfusionenergy.com/technical/wave-heating.html): Depositing power by launching electromagnetic waves that the plasma absorbs.
- [Wave Cutoffs and Resonances](https://kronosfusionenergy.com/technical/cyclotron-cutoff.html): Density and field thresholds that decide which heating waves reach the plasma core.
- [Why the Kronos Approach Matters](https://kronosfusionenergy.com/technical/why-kronos-matters.html): A firm, clean, staged path to fusion value — argued in the open.
- [Worker Dose Management](https://kronosfusionenergy.com/technical/worker-dose.html): Keeping occupational radiation exposure as low as reasonably achievable.
- [X-Point](https://kronosfusionenergy.com/technical/x-point.html): The magnetic null where the separatrix crosses itself, steering exhaust to the divertor.
- [X-Ray Crystal Spectroscopy](https://kronosfusionenergy.com/technical/xray-crystal-spectrometer.html): Precise ion-temperature and rotation measurement from X-ray lines.
- [Z-Pinch](https://kronosfusionenergy.com/technical/z-pinch.html): Compressing plasma with its own axial current — a pulsed alternative.
- [Zonal Flows](https://kronosfusionenergy.com/technical/zonal-flow.html): Self-generated sheared flows that regulate plasma turbulence.

## Questions & Honest Answers
- [Can I see the data behind Kronos?](https://kronosfusionenergy.com/technical/can-i-see-the-data.html): Yes — five open Zenodo deposits contain the engines, inputs and expected outputs, free to download and re-run.
- [Can a Kronos machine melt down?](https://kronosfusionenergy.com/technical/can-a-fusion-plant-melt-down.html): No. A fusion plasma has no chain reaction and holds only seconds of fuel; loss of control simply stops it.
- [Can a fusion plant follow demand, or only run flat-out?](https://kronosfusionenergy.com/technical/can-fusion-follow-demand.html): A driven machine is steerable by its heating, so it can in principle follow load, not just run baseload.
- [Can fusion ever be cheap?](https://kronosfusionenergy.com/technical/can-fusion-be-cheap.html): Cost is the open question — Kronos's answer is a saleable product first and honest cost studies, not a claim.
- [Does Kronos claim net electricity today?](https://kronosfusionenergy.com/technical/does-kronos-claim-net-electricity.html): No. Net electricity is a computed design target with stated gates, not a demonstrated result.
- [Does Kronos need helium-3 from the Moon?](https://kronosfusionenergy.com/technical/does-kronos-need-lunar-helium3.html): No — the breeder makes its own helium-3; lunar sourcing is a long-term option, not a dependency.
- [Does fusion depend on rare materials?](https://kronosfusionenergy.com/technical/does-fusion-use-rare-materials.html): The fuels are abundant; the notable scarce input is helium-3, which the breeder makes itself.
- [Does fusion produce radioactive waste?](https://kronosfusionenergy.com/technical/does-fusion-produce-waste.html): No long-lived high-level waste — only activated structure, kept short-lived by material choice.
- [Has Kronos built a reactor?](https://kronosfusionenergy.com/technical/has-kronos-built-a-reactor.html): Not yet — but construction of the HYPERION breeder is scheduled to begin in Q2 2027; today Kronos is a design-and-simulation study.
- [How big is a Kronos machine?](https://kronosfusionenergy.com/technical/how-big-is-a-kronos-plant.html): The breeder is compact (~1.2 m major radius); the burner scales in length from 55 to 1400 m by product.
- [How do we know the Kronos numbers are real?](https://kronosfusionenergy.com/technical/how-do-we-know-the-numbers-are-real.html): Because you can download the engines and reproduce them yourself.
- [How does Kronos create value before net electricity?](https://kronosfusionenergy.com/technical/how-does-kronos-make-money-before-electricity.html): By selling the breeder's products — tritium, neutrons, isotopes and helium-3.
- [How does Kronos stay honest about its claims?](https://kronosfusionenergy.com/technical/how-is-kronos-honest.html): By publishing reproducible engines, labelling requirement-class results, and naming its gates — as policy.
- [How does direct energy conversion work?](https://kronosfusionenergy.com/technical/how-does-direct-conversion-work.html): It decelerates escaping ions against an electric field, capturing their energy as electricity.
- [How hot is a Kronos plasma?](https://kronosfusionenergy.com/technical/how-hot-is-the-plasma.html): Tens to a hundred million degrees — hotter than the Sun's core.
- [How much fuel does a fusion plant actually use?](https://kronosfusionenergy.com/technical/how-much-fuel-does-fusion-need.html): Grams per day — fusion is millions of times more fuel-efficient than combustion.
- [Is Kronos fusion aneutronic?](https://kronosfusionenergy.com/technical/is-kronos-fusion-aneutronic.html): No. The burner is low-neutron, not aneutronic — a distinction Kronos always makes.
- [Is Kronos just a smaller ITER?](https://kronosfusionenergy.com/technical/is-this-like-iter.html): No — it is a different architecture and business model, though it builds on the same shared science.
- [Is fusion radioactive at all?](https://kronosfusionenergy.com/technical/is-fusion-radioactive.html): Mildly and briefly — activated structure and tritium, but no long-lived high-level waste.
- [Is the Kronos work peer-reviewed?](https://kronosfusionenergy.com/technical/is-kronos-peer-reviewed.html): The deposits are openly reproducible now; conventional peer review through arXiv and journals is in preparation.
- [Is the interactive 3D model a real machine?](https://kronosfusionenergy.com/technical/is-the-3d-model-real.html): It is a physics-grounded design instrument, not a mirror of operating hardware — and it says so.
- [Is tritium a showstopper?](https://kronosfusionenergy.com/technical/is-tritium-a-problem.html): No — it is a handled hazard, and the breeder makes its own so supply is not a constraint.
- [Kronos is a small company — why believe any of this?](https://kronosfusionenergy.com/technical/what-makes-this-credible.html): Because you can download and re-run the engines, and every caveat is stated up front.
- [What are Kronos's biggest open questions?](https://kronosfusionenergy.com/technical/what-are-the-open-questions.html): The plug-density requirement, plug-magnet cyclic fatigue, and breeder confinement and divertor assumptions.
- [What are MetroVolt and AEGIS?](https://kronosfusionenergy.com/technical/what-are-metrovolt-and-aegis.html): Two housings of the same D–³He burner — MetroVolt for grid/data-centre power, AEGIS for defence installations.
- [What can I do with Kronos's open data?](https://kronosfusionenergy.com/technical/what-can-i-do-with-the-open-data.html): Download it, re-run it, verify the numbers, and cite it — it is CC BY 4.0.
- [What does it mean that Kronos is a 'driven' system?](https://kronosfusionenergy.com/technical/what-is-a-driven-system.html): It is continuously heated rather than self-igniting — which makes it controllable.
- [What happens if something fails mid-operation?](https://kronosfusionenergy.com/technical/what-happens-if-something-fails.html): The plasma simply cools and stops within seconds — there is no stored energy to run away.
- [What if the burner's plug requirement can't be met?](https://kronosfusionenergy.com/technical/what-if-the-plug-fails.html): Then the burner does not close as a net-power machine — which is exactly why Kronos labels it requirement-class.
- [What is HYPERION?](https://kronosfusionenergy.com/technical/what-is-hyperion.html): Kronos's breeder — a compact spherical tokamak that makes neutrons, tritium and helium-3.
- [What is a tandem mirror?](https://kronosfusionenergy.com/technical/what-is-a-tandem-mirror.html): A straight fusion machine plugged at both ends by high-field magnets and an electric potential.
- [What is the catch with the burner?](https://kronosfusionenergy.com/technical/whats-the-catch-with-the-burner.html): Net power is requirement-class: it depends on reaching a plug-density ratio near 16.
- [What is the plug-density ratio and why does it matter?](https://kronosfusionenergy.com/technical/what-is-the-plug-density-ratio.html): It is the burner's binding requirement — the plug must reach ~16× the central density to confine the plasma.
- [What is the single biggest technical risk?](https://kronosfusionenergy.com/technical/what-is-the-single-biggest-risk.html): The burner's plug-density requirement — the one item that most gates net electric power.
- [What makes Kronos different from other fusion startups?](https://kronosfusionenergy.com/technical/how-is-kronos-different.html): A breeder-first, two-machine strategy with a product before net electricity — and a verifiably honest, open record.
- [When will fusion be ready?](https://kronosfusionenergy.com/technical/when-will-fusion-be-ready.html): Kronos gives gate-based milestones, not a fixed date — and stages a saleable product ahead of net electricity.
- [Why a spherical tokamak for the breeder?](https://kronosfusionenergy.com/technical/why-spherical-tokamak.html): It holds more plasma pressure per tesla — the route to a compact neutron source.
- [Why build the breeder if electricity is not its product?](https://kronosfusionenergy.com/technical/why-a-breeder-if-it-loses-money.html): Because its products — tritium, neutrons, isotopes, helium-3 — have value independent of net-electric fusion.
- [Why does Kronos build two different machines?](https://kronosfusionenergy.com/technical/why-two-machines.html): Because fuel should follow purpose: one machine breeds fuel, the other burns it for electricity.
- [Why does Kronos use two different fuels?](https://kronosfusionenergy.com/technical/why-two-fuels.html): Because fuel should follow purpose: D–T to breed and make neutrons, D–³He to make clean electricity.
- [Why does neutron wall loading matter so much?](https://kronosfusionenergy.com/technical/what-is-the-neutron-wall-loading.html): It sets how fast materials wear and how often components are replaced.
- [Why not just build one D–T machine like everyone else?](https://kronosfusionenergy.com/technical/why-not-just-dt.html): Because a breeder-plus-low-neutron-burner sells a product sooner and makes cleaner electricity.
- [Why should a national lab care about Kronos?](https://kronosfusionenergy.com/technical/why-should-a-lab-care.html): Because everything is reproducible, honestly graded, and anchored to the shared physics database.

## Team & Heritage
- [Honesty as an Engineering Principle](https://kronosfusionenergy.com/technical/the-honesty-framework-in-practice.html): How the honesty framework shows up in day-to-day engineering decisions, not just messaging.
- [The Experience Behind Kronos](https://kronosfusionenergy.com/technical/the-experience-behind-kronos.html): Kronos is built by scientists and engineers whose careers span the world's major fusion and large-science programmes — six decades of accumulated fusion experience.
- [The Kronos Scientific Approach](https://kronosfusionenergy.com/technical/the-scientific-approach.html): Conservative assumptions, open data, and explicit gates — the scientific posture that runs through the whole Kronos programme.

## Safety & Environment
- [Can Fusion Be Used for Weapons?](https://kronosfusionenergy.com/technical/can-fusion-be-used-for-weapons.html): No — a power plant's slow, low-density plasma is the opposite of what a weapon needs.
- [Decommissioning a Fusion Plant](https://kronosfusionenergy.com/technical/decommissioning.html): Taking a plant apart at end of life — easier than fission, with mostly short-lived waste.
- [Fusion and Land Use](https://kronosfusionenergy.com/technical/land-use.html): Compact, high-density generation with a small footprint per megawatt.
- [Fusion and Non-Proliferation](https://kronosfusionenergy.com/technical/no-proliferation.html): Fusion produces no plutonium or enriched uranium; its proliferation profile is fundamentally different from fission.
- [Fusion and Water Use](https://kronosfusionenergy.com/technical/water-use.html): Cooling water needs are conventional-plant scale; the burner's direct conversion can reduce them.
- [Fusion's Carbon Footprint](https://kronosfusionenergy.com/technical/fusion-carbon-footprint.html): Zero-carbon in operation; the honest question is embodied carbon in construction.
- [Fusion's Waste Profile](https://kronosfusionenergy.com/technical/fusion-waste.html): No long-lived high-level waste; activated structure that low-activation materials keep short-lived.
- [Lifecycle Environmental Assessment](https://kronosfusionenergy.com/technical/lifecycle-assessment.html): Judging fusion on its whole lifecycle, not just clean operation.
- [Radiation Protection](https://kronosfusionenergy.com/technical/radiation-protection.html): Keeping doses to workers and public well within limits by design.
- [The Fusion Environmental Case](https://kronosfusionenergy.com/technical/the-environmental-case.html): Zero-carbon operation, no long-lived waste — assessed on the full lifecycle.
- [The Fusion Safety Case](https://kronosfusionenergy.com/technical/the-safety-case.html): Why the evidence says a fusion plant is safe by nature.
- [Tritium Safety](https://kronosfusionenergy.com/technical/tritium-safety.html): Tritium is managed with low inventories, permeation barriers and monitoring — a handled hazard, stated plainly.
- [Why Fusion Is Inherently Safe](https://kronosfusionenergy.com/technical/inherent-safety.html): There is no chain reaction and only seconds of fuel in the machine; any fault simply stops the plasma.

## Codes & Standards
- [ASCE Seismic & Structural Standards](https://kronosfusionenergy.com/technical/seismic-standards.html): The standards for structural and nuclear-seismic design.
- [ASME Boiler & Pressure Vessel Code](https://kronosfusionenergy.com/technical/asme-bpvc.html): The code governing the vacuum vessel and pressure boundaries.
- [ASME NQA-1](https://kronosfusionenergy.com/technical/nqa-1.html): The nuclear-grade quality-assurance standard fusion work moves toward.
- [ASTM Materials Standards](https://kronosfusionenergy.com/technical/materials-standards.html): The specifications and test methods for qualifying materials.
- [Codes & Standards Overview](https://kronosfusionenergy.com/technical/codes-overview.html): A fusion plant is engineered to established industrial and nuclear codes, not invented rules.
- [Cryogenic Codes](https://kronosfusionenergy.com/technical/cryogenic-standards.html): The standards governing cryogenic vessels and safety.
- [IAEA Safety Framework](https://kronosfusionenergy.com/technical/iaea-framework.html): The international safety guidance the fusion field is adapting.
- [IEC 61508 / 61511 Functional Safety](https://kronosfusionenergy.com/technical/functional-safety-standards.html): The standards governing the safety-instrumented system and its integrity level.
- [IEEE Electrical Standards](https://kronosfusionenergy.com/technical/electrical-standards.html): The standards for plant power distribution and protection.
- [ISO 9001 / AS9100 Quality Management](https://kronosfusionenergy.com/technical/quality-management.html): The baseline quality-management systems underpinning the programme.
- [NFPA Fire Protection](https://kronosfusionenergy.com/technical/fire-protection-standards.html): The standards for fire protection and life safety.
- [Radiological & Tritium Standards](https://kronosfusionenergy.com/technical/tritium-standards.html): The regulations governing radiological protection and tritium handling.

## Comparisons & Context
- [Fusion vs Fission](https://kronosfusionenergy.com/technical/fusion-vs-fission.html): Both split the atom's binding energy, but fusion has no chain reaction, no meltdown, no long-lived waste and no bomb material.
- [Fusion vs Natural Gas](https://kronosfusionenergy.com/technical/fusion-vs-gas.html): Fusion targets the firm, dispatchable role gas plays today — without the fuel-price exposure or the carbon.
- [Fusion vs Solar and Wind](https://kronosfusionenergy.com/technical/fusion-vs-solar-wind.html): Complementary, not rival: fusion offers firm, compact, always-available power where renewables are intermittent and land-intensive.
- [Kronos in Context: ITER and the Big-Science Path](https://kronosfusionenergy.com/technical/kronos-vs-iter.html): ITER proves the physics at scale; Kronos pursues a compact, high-field, commercially-staged alternative.
- [Kronos vs the Mainstream D–T Tokamak](https://kronosfusionenergy.com/technical/kronos-vs-dt-tokamak.html): Most fusion pursues a single large D–T tokamak for electricity; Kronos splits the job into a breeder and a low-neutron burner.
- [Tandem Mirror vs Tokamak](https://kronosfusionenergy.com/technical/tandem-mirror-vs-tokamak.html): The burner's linear geometry avoids disruptions and enables direct conversion, at the cost of end-plugging.
- [Why Fusion, Why Now](https://kronosfusionenergy.com/technical/why-now.html): High-temperature superconductors, modern computation and open validation have changed what a small team can credibly design.

## Competitive Landscape
- [Confinement Approaches Compared](https://kronosfusionenergy.com/technical/the-three-approaches.html): Magnetic (tokamak, stellarator, mirror), inertial, and hybrid — the main routes to fusion.
- [Deuterium–Tritium vs Advanced Fuels](https://kronosfusionenergy.com/technical/dt-vs-advanced-fuels.html): The field's central fuel divide — and why Kronos runs both sides of it.
- [How to Compare Fusion Programmes Honestly](https://kronosfusionenergy.com/technical/how-to-compare-fusion.html): Look past hero numbers to closure, plant-level gain, capital and product timing.
- [Neutron-Heavy vs Low-Neutron Machines](https://kronosfusionenergy.com/technical/neutron-heavy-vs-low-neutron.html): Where the fusion energy goes shapes everything — conversion, materials, siting.
- [Public Fusion Programmes](https://kronosfusionenergy.com/technical/the-public-programmes.html): The megaprojects and national labs whose science the whole field — including Kronos — builds on.
- [The Fusion Competitive Landscape](https://kronosfusionenergy.com/technical/the-competitive-landscape.html): The field splits three ways — public megaprojects, private compact ventures, and alternative concepts — and Kronos takes a distinct path through all three.
- [The Inertial-Confinement Approach](https://kronosfusionenergy.com/technical/inertial-approach.html): Compressing fuel with lasers or beams — a pulsed alternative to magnetic confinement.
- [The Magnetic-Mirror Approach](https://kronosfusionenergy.com/technical/mirror-approach.html): A linear machine — simple geometry, direct conversion, and the plugging challenge Kronos's burner addresses.
- [The Stellarator Approach](https://kronosfusionenergy.com/technical/stellarator-approach.html): Twisting the field with external coils alone — no plasma current, no disruptions.
- [The Tokamak Approach](https://kronosfusionenergy.com/technical/tokamak-approach.html): The most-studied path: a toroidal magnetic bottle with a driven plasma current.
- [Where Kronos Fits](https://kronosfusionenergy.com/technical/where-kronos-fits.html): A breeder-first, two-machine, openly-validated path — distinct from the single-D–T-tokamak mainstream.

## Reference Devices
- [Alcator C-Mod](https://kronosfusionenergy.com/technical/device-alcator.html): A compact, high-field tokamak that showed the payoff of strong magnetic fields.
- [DIII-D](https://kronosfusionenergy.com/technical/device-diii-d.html): A versatile tokamak that pioneered plasma shaping and negative-triangularity studies.
- [EAST and KSTAR](https://kronosfusionenergy.com/technical/device-east-kstar.html): Superconducting tokamaks demonstrating long-pulse operation.
- [ITER](https://kronosfusionenergy.com/technical/device-iter.html): The international megaproject building the largest tokamak to prove burning-plasma physics at scale.
- [JET](https://kronosfusionenergy.com/technical/device-jet.html): The Joint European Torus — long the largest operating tokamak and a D–T record-holder.
- [JT-60SA](https://kronosfusionenergy.com/technical/device-jt60.html): A large superconducting tokamak advancing steady-state and high-beta operation.
- [NSTX / NSTX-U](https://kronosfusionenergy.com/technical/device-nstx.html): A leading spherical-tokamak experiment establishing low-aspect-ratio, high-beta physics.
- [National Ignition Facility](https://kronosfusionenergy.com/technical/device-nif.html): The laser facility that achieved target energy gain in 2022 by inertial confinement.
- [TFTR](https://kronosfusionenergy.com/technical/device-tftr.html): An early US tokamak that ran D–T and helped establish fusion performance records.
- [TMX and Historical Tandem Mirrors](https://kronosfusionenergy.com/technical/device-tmx.html): The 1980s experiments that established tandem-mirror plugging physics.
- [The Gas-Dynamic Trap](https://kronosfusionenergy.com/technical/device-gdt.html): A mirror experiment demonstrating stable, high-beta open-ended confinement.
- [Wendelstein 7-X](https://kronosfusionenergy.com/technical/device-w7x.html): The flagship stellarator demonstrating disruption-free, steady-state confinement.

## History & Context
- [A Short History of Fusion Energy](https://kronosfusionenergy.com/technical/history-of-fusion.html): From 1950s tokamaks and mirrors to today's compact, high-field machines.
- [Open Science Comes to Fusion](https://kronosfusionenergy.com/technical/open-science-in-fusion.html): Why publishing reproducible engines, not just results, is a shift for the field.
- [The Direct-Conversion Story](https://kronosfusionenergy.com/technical/direct-conversion-history.html): How turning ions straight into electricity moved from concept to the burner.
- [The Magnetic Mirror's Second Life](https://kronosfusionenergy.com/technical/history-of-mirrors.html): Why an old idea, reworked with modern magnets and physics, is compelling again.
- [The Modern Fusion Landscape](https://kronosfusionenergy.com/technical/the-fusion-landscape.html): Public megaprojects, private compact ventures, and where Kronos's strategy differs.
- [The Rise of High-Field Superconductors](https://kronosfusionenergy.com/technical/history-of-superconducting-magnets.html): How REBCO tape changed what a compact fusion machine can be.
- [The Spherical-Tokamak Story](https://kronosfusionenergy.com/technical/spherical-tokamak-history.html): How the low-aspect-ratio idea grew into a serious reactor line.