高能同步辐射光源中的耦合阻抗及束流集体效应研究  

Study of Beam Coupling Impedance and Beam Collective Effect in High Energy Photon Source

作　　者：王娜[1] 许海生 田赛克 段哲 李啸宇[1] WANG Na;XU Haisheng;TIAN Saike;DUAN Zhe;LI Xiaoyu(Key Laboratory of Particle Acceleration Physics and Technology,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所粒子加速物理与技术重点实验室

出　　处：《原子能科学技术》2019年第9期1601-1606,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11775239);国家重点研发计划资助项目(2016Y-FA0402001);中国科学院前沿科学重点研究计划资助项目(QYZDJ-SSW-SLH001)

摘　　要：在高能同步辐射光源(HEPS)的储存环中,由于真空盒尺寸较小、束团中电子密度较大,全环耦合阻抗将显著增加,束流集体效应成为限制机器性能的重要因素。本文基于解析理论和数值模拟程序对HEPS储存环耦合阻抗进行了逐元件建模,并对环中可能发生的束流集体效应进行了系统评估。建立了合理的阻抗模型,给出了不稳定性阈值和增长时间,并对关键的不稳定性问题提出有效的抑制措施。In the storage ring of high energy photon source(HEPS),due to the small vacuum chamber and high bunch intensity,the total beam coupling impedance remarkably increases and the beam collective effect becomes the key limit of the machine performance.In this paper,the element-by-element model of beam coupling impedance for HEPS storage ring was carried out based on analytical theory and numerical simulation program,and a systematic estimation on the possible beam collective effect was carried out.A reasonable impedance model was established.The instability threshold and the growth time were given,and the effective suppression method for the key instability was presented.

关 键 词：高能同步辐射光源 耦合阻抗 束流集体效应 离子效应 束内散射 

分 类 号：TL50[核科学技术—核技术及应用]