Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2011, Vol. 22 ›› Issue (5): 257-260 doi: 10.13538/j.1001-8042/nst.22.257-260

• SYNCHROTRON TECHNOLOGY AND APPLICATIONS •     Next Articles

Simulation of higher order modes and loss factor of a new type of 500-MHz single cell superconducting cavity at SSRF

YU Haibo~(1,2,3) LIU Jianfei~(1,3,*) HOU Hongtao~(1,3) LU Changwang~(1,2,3) WEI Yelong~(1,2,3) MA Zhenyu~(1,3) FENG Ziqiang~(1,3) MAO Dongqing~(1,3)   

  1. 1 Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Shanghai Key Lab of Cryogenics & Superconducting RF Technology,Shanghai 201800,China
YU Haibo, LIU Jianfei, HOU Hongtao, LU Changwang, WEI Yelong, MA Zhenyu, FENG Ziqiang, MAO Dongqing. Simulation of higher order modes and loss factor of a new type of 500-MHz single cell superconducting cavity at SSRF.Nuclear Science and Techniques, 2011, 22(5): 257-260     doi: 10.13538/j.1001-8042/nst.22.257-260

Abstract:

In this paper,higher order modes(HOMs) and loss factor of a new type of 500-MHz superconducting cavity is studied,by simulating its broadband HOMs damping at different positions of the ferrite HOM-absorber and different lengths of the ferrite.The results show that the impedance and Q value of the HOMs in transverse and longitudinal modes could be greatly reduced.The HOM longitudinal impedance could be damped to meet the requirement of SSRF beam instability threshold.The calculated loss factor of the new SC cavity was compared with cavities at SSRF.It was estimated that the HOM absorber could absorb a total power of 3.16 kW at 4-mm beam bunch length.

Key words: Superconducting RF, HOM absorber, Loss factor