三次谐波超导腔高次模抑制研究  

Higher order mode damping of a higher harmonic superconducting cavity for SSRF

作　　者：于海波[1,2,3] 刘建飞[1,3] 侯洪涛[1,3] 马震宇[1,3] 封自强[1,3] 毛冬青[1,3] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049 [3]上海市低温超导高频腔技术重点实验室,上海201800

出　　处：《核技术》2012年第1期1-4,共4页Nuclear Techniques

摘　　要：对上海同步辐射装置中超导三次谐波腔开展了高次模深度抑制研究。分析了上海光源对三次谐波腔高次模的抑制要求,用电磁场计算软件SEAFISH作高次模吸收器长度、安装位置等参数的模拟计算和优化设计,以深度抑制各有害高次模,使高次模的分路阻抗降至能满足束团不稳定性阈值的要求。用ABCI计算得到了谐波腔的高次模功耗理论值。Adopting a higher harmonic cavity on a synchrotron radiation facility can increase the beam lifetime and suppress the beam instability. In this paper, we report the simulation and preliminary design on higher order modes （HOMs） damping of the designed and fabricated higher harmonic superconducting cavity for Shanghai Synchrotron Radiation Facility （SSRF）. The requirements for the HOM damping are analyzed, and the length and location of the HOM damper are optimized by using the SEAFISH code. The results show that the design can provide heavy damping for harmful HOMs with decreased impedance, and the beam instability requirement of SSRF can be satisfied By using the ABCI code, the loss factor is obtained and the HOM power is estimated.

关 键 词：三次谐波腔 高次模吸收器 模拟计算 损耗因子 

分 类 号：TL503.2[核科学技术—核技术及应用]