Speaker
Description
Lead talk session B-1.
Designing next-generation high-intensity linacs requires a detailed understanding of collective beam physics and the technological constraints that limit reliable MW-class operation. As beam currents enter the strongly space-charge-dominated regime, emittance growth, halo formation, and beam loss become tightly coupled to injector dynamics, neutralization processes, and lattice design. These challenges are central not only for facilities such as FRIB, ESS, and IFMIF-related programs, but also for emerging concepts that require sustained high-intensity operation.
Japan’s Moonshot Goal 10 (MS10) program has launched a coordinated effort to develop high-intensity accelerator technologies for fusion‑relevant neutron irradiation. A key component of MS10 is the development of a high-current single‑cell linac capable of accelerating large-aperture beams to mitigate space-charge effects through reduced beam density. This approach supports detailed studies of halo formation mechanisms, and stability limits under continuous high-power operation.
This overview summarizes the physical mechanisms, design drivers, and unresolved questions that define next-generation high-intensity linacs, with emphasis on how MS10’s large-aperture single‑cell linac program offers new insight and a scalable pathway toward future highest-intensity accelerator facilities. The talk provides a framework for discussions on injector physics, halo control, and integrated design strategies.