Fusion vs Accelerator Neutron Sources

Accelerator-based sources and fusion sources both make fast neutrons; they differ in spectrum, steadiness, and scale of service.

Two ways to make fast neutrons

Accelerator-driven sources produce neutrons by striking a target with an ion beam; some use the same D-T reaction to reach 14 MeV. A fusion device makes 14 MeV neutrons in a burning plasma. Both are valuable, and they suit different needs depending on the flux, volume, and duration a campaign requires.

Where each fits

• Accelerators: compact, flexible, widely available
• Accelerators: flux and volume can be duty-cycle limited
• Fusion: a large, sustained 14 MeV source volume
• Fusion: pairs neutron service with isotope co-production

Complementary, not rival

Accelerator sources are established and important, and many campaigns are well served by them. A fusion source adds sustained, high-volume 14 MeV capacity and couples neutron service to isotope production in one machine. Kronos positions the breeder to fill that role alongside, not instead of, accelerator facilities.

Coupling neutrons to co-production

A distinctive feature of the fusion route is that neutron service and isotope production come from the same machine. An accelerator makes neutrons but does not breed tritium or co-produce helium-3 as a byproduct of its operation. The breeder does both from one plasma, so a single facility can serve testing customers and supply strategic isotopes at the same time. That coupling is part of why Kronos pursues a fusion source alongside, not instead of, accelerator capacity.

This page describes a design and simulation study, not a built machine. The breeder (Hyperion) begins construction Q2 2027; first-of-a-kind first tritium is targeted near 2030. No hardware net-gain is claimed before then.