Neutron-Based Cargo Interrogation

Active neutron interrogation can probe cargo for hidden materials by inducing and reading nuclear signatures; it draws on neutron sources and detectors.

Active, not just passive

Passive screening waits for a source to emit radiation on its own. Active interrogation sends neutrons into a container and reads the induced response, such as prompt or delayed signatures from fissile material. It can reveal materials that emit little on their own, in exchange for more complex equipment and careful safety controls.

What it can add

• Prompts a response from otherwise quiet material
• Complements passive gamma and neutron screening
• Requires strict operational and safety controls

Where Kronos fits and does not

Kronos develops fusion neutron sources and contributes to detector-material supply. It does not build or operate interrogation systems, and this page addresses only the public physics and the supply-chain connection. Operational interrogation methods are outside a public discussion.

The relevant contribution is the same as elsewhere: a domestic, controllable neutron capability and a supply of scarce detector isotopes.

Where the value and the limits sit

Active interrogation can reveal well-shielded material that emits little on its own, which passive methods may miss. That capability comes with real constraints: the equipment is more complex, the operation demands strict radiation-safety controls, and throughput is lower than passive screening. These trade-offs mean interrogation is applied selectively, on flagged loads, rather than universally. Kronos speaks only to the source and detector physics behind it, not to how such systems are deployed. The relevant Kronos contribution remains the same across passive and active methods alike: a domestic, controllable 14 MeV source and a supply of the scarce isotopes that detectors depend on.

This is a public overview only. It contains no classified information, no operational detail, and no weapons-design content.