Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (6): 60103-060103.doi: 10.11889/j.0253-3219.2015.hjs.38.060103


Simulation of a 1 500 MHz 5-cell superconducting cavity

YANG Jun1,2,3 MA Zhenyu1,3 WANG Yan1,3 HOU Hongtao1,3 LI Zheng1,3 LUO Chen1,3 MAO Dongqing1,3 SHI Jing1,3 LIU Jianfei1,3   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China) 3(Shanghai Key Lab of Cryogenics & Superconducting RF Technology, Shanghai 201800, China)
  • Received:2015-02-11 Revised:2015-04-13 Online:2015-06-10 Published:2015-06-05

Abstract: Background: Energy Recovery Linacs (ERLs) are being developed over the world to realize future light sources and other applications. Purpose: The aim is to design a new 1 500 MHz 5-cell superconducting cavity for main linac in the ERL. Methods: The new cavity geometry was optimized by several radio-frequency softwares. Results: The new cavity is endowed with the following advantages: with the R/Q of the fundamental mode TM010 to be 550 ?, cryogenic losses could be reduced effectively; in order to reduce the risk of field emission, the parameters Epk/Eacc, Bpk/Eacc were optimized respectively to 2.06 and 4.22; a larger beam pipe was employed to propagate the higher order modes (HOMs) out of the cavity, increasing the damping efficiently for the dangerous HOMs. Conclusion: It was found that radio frequency property of the new cavity could meet the requirements of ERL-based Free Electron Laser (FEL) very well.

Key words: Accelerator, Superconducting cavity, Higher order modes, Simulation