LINAC2026 - 33rd Linear Accelerator Conference

Study of RF Beam Separation and Scanning Uniformization Techniques for High Power Particle Accelerators

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC1.A01: Beam Dynamics, beam simulations, beam transport Poster Session

Speaker

Jie Zeng (Institute of Modern Physics, Chinese Academy of Sciences)

Description

High-power particle accelerator beams have important applications in many fields. Multi-terminal beam delivery can improve beam utilization, while the extremely high peak current density on the target surface limits the safe and stable operation of target stations. To meet the demand for simultaneous multi-terminal beam delivery, RF beam separation was studied. A scheme based on a RF deflecting cavity and septum magnets was used to distribute the beam among different target stations. Beam dynamics simulations show that this scheme can achieve loss-free transport. After separation, the beam emittance increases significantly, mainly due to RF-field nonlinearity. To address the peak current density limitation on a single target, beam scanning uniformization was studied. A technical scheme based on point scanning and circular scanning was adopted to achieve beam uniformization on the target surface. Numerical simulations show that the peak current density is reduced to 8.62 μA/cm². Beam dynamics simulations show that point scanning can inject the beam spot into the target center, and circular scanning enables the beam spot to form a circular distribution on the target.