S波段HYBRID聚束-加速结构的样机研制  

Development of S-band hybrid bunching-accelerating structure prototype

作　　者：高斌 裴士伦 王辉[3] 赵世琦[3] 池云龙[3] Gao Bin;Pei Shilun;Wang Hui;Zhao Shiqi;Chi Yunlong(Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Research and Design Center for Cyclotron,China Institute of Atomic Energy,Beijing 102413,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]清华大学工程物理系,北京100084 [2]中国原子能科学研究院回旋加速器研究设计中心,北京102413 [3]中国科学院高能物理研究所,北京100049

出　　处：《强激光与粒子束》2021年第2期89-95,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11475201);中国科学院青年创新促进会基金项目。

摘　　要：Hybrid聚束-加速结构是把驻波预聚束器、行波聚束器和标准加速管集成到一起的新型RF结构。简述了对S波段Hybrid聚束-加速结构样机的束流动力学优化和微波设计结果,解释了Hybrid结构导致发射度增长的原因,对此样机进行了射频低功率测试。样机的冷测结果与RF设计结果一致性很好。在冷测频率2855.21 MHz处,实测S11小于-45 dB,腔间相移偏差小于±2°,VSWR≤1.2对应的带宽大于5 MHz,轴向场分布完全满足动力学要求。Hybrid bunching-accelerating structure(HBaS)is a novel RF structure integrating a standingwave(SW)pre-buncher(PB),a traveling-wave(TW)buncher(B)and a standard accelerating structure together.This paper presents the design results,including beam dynamic optimization,microwave design and the cold test of the Sband HBaS prototype,and explicates the reason of transverse emittance increasement caused by the hybrid structure.The low RF power results are in good agreement with the RF design.The measured S11 at operation frequency is less than-45 dB,the phase shift deviation is less than±2°and the bandwidth is more than 5 MHz(VSWR≤1.2).The axis field distribution fully meets the dynamic requirements.

关 键 词：聚束系统 Hybrid聚束-加速结构 非谐振微扰法 反射相位法 低功率测试 

分 类 号：TM931[电气工程—电力电子与电力传动]