用于强流质子多脉冲压缩系统的超低频踢束腔研究进展OA

The high-intensity proton accelerator serves as the key device for generating high-intensity neutrons by shooting targets,featuring high repetition rate,high single-pulse neutron count,and narrow pulse width.To promote the applications of high-intensity proton accelerators in fast neutron physics,neutron(or proton)imaging,and radiation-hardening,the bunch compression technology,which can increase the single-pulse proton count has attracted much attention.Bunch compressor achieves longitudinal rebunching by path differences,allowing them to strike the target simultaneously.Compared to the energy difference method,its energy spread can be negligible and the compression effect is ideal.The ultra-low frequency kicking cavity located at the entrance of the bunch compressor has always been a key technical difficulty due to its ultra-low frequency,high deflecting electric field,low power consumption,and high-precision kicking requirements.In recent years,the capacitance and inductance have been effectively increased by introducing plates and coils,which is expected to enable a compact kicking cavity design within a confined space.This paper outlines the different implementation methods of the bunch compression and reviews the research progress of kicking cavities from the high-frequency to ultra-low frequency regimes.Challenges of the ultra-low frequency kicking cavity in achieving beam operation are presented in this paper,providing theoretical and technical references for promoting the development and application of bunch compression technology based on path differences.