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

YU Haibo1; 3 LIU Jianfei 1; 3 HOU Hongtao 1; 3 MA Zhenyu 1; 3 FENG Ziqiang 1; 3 MAO Dongqing1

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

更新时间：2021-03-05

- Higher order mode damping of a higher harmonic superconducting cavity for SSRF
- NUCLEAR TECHNIQUES Vol. 35, Issue 1, (2012)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所
  2. 中国科学院研究生院
  3. 上海市低温超导高频腔技术重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL503.2
- Published：01 January 2012
- 稿件说明：
移动端阅览
[1]于海波,刘建飞,侯洪涛,马震宇,封自强,毛冬青.三次谐波超导腔高次模抑制研究[J].核技术,2012,35(01):1-4.

YU Haibo1, 3 LIU Jianfei 1, 3 HOU Hongtao 1, et al. Higher order mode damping of a higher harmonic superconducting cavity for SSRF[J]. Nuclear techniques, 2012, 35(1): 1-4.
[1]于海波,刘建飞,侯洪涛,马震宇,封自强,毛冬青.三次谐波超导腔高次模抑制研究[J].核技术,2012,35(01):1-4. DOI：

YU Haibo1, 3 LIU Jianfei 1, 3 HOU Hongtao 1, et al. Higher order mode damping of a higher harmonic superconducting cavity for SSRF[J]. Nuclear techniques, 2012, 35(1): 1-4. DOI：

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。

Abstract

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.

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Related Author

MA Zhenyu

WANG Yan

HOU Hongtao

LI Zheng

LUO Chen

MAO Dongqing

SHI Jing

LIU Jianfei

Related Institution

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus

University of Chinese Academy of Sciences

Shanghai Key Lab of Cryogenics & Superconducting RF Technology

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics

State Key Laboratory of Nuclear Physics and Technology, Peking University

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