X-band deflecting cavity design for ultra-short bunch length measurement of SXFEL at SINAP

Jian-Hao TAN; Qiang GU; Wen-Cheng FANG; De-Chun TONG; Zhen-Tang ZHAO

doi:10.13538/j.1001-8042/nst.25.060101

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X-band deflecting cavity design for ultra-short bunch length measurement of SXFEL at SINAP

SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS | Updated：2021-01-20

- X-band deflecting cavity design for ultra-short bunch length measurement of SXFEL at SINAP
- Nuclear Science and Techniques Vol. 25, Issue 6, Article number: 060101(2014)
- Affiliations：
  
  1.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai201800, China
  2.University of Chinese Academy of Sciences, Beijing100049, China
  3.Department of Engineering Physics, Tsinghua University, Beijing100084, China
  4.Shanghai Key Laboratory of Cryogenics & Superconducting RF Technology, Shanghai201800, China
- Author bio：
  
  Corresponding author, zhaozhentang@sinap.ac.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.25.060101
  CLC：
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Jian-Hao TAN, Qiang GU, Wen-Cheng FANG, et al. X-band deflecting cavity design for ultra-short bunch length measurement of SXFEL at SINAP. [J]. Nuclear Science and Techniques 25(6):060101(2014)
DOI：

Jian-Hao TAN, Qiang GU, Wen-Cheng FANG, et al. X-band deflecting cavity design for ultra-short bunch length measurement of SXFEL at SINAP. [J]. Nuclear Science and Techniques 25(6):060101(2014) DOI： 10.13538/j.1001-8042/nst.25.060101.

摘要

Abstract

For developing the X-ray Free Electron Lasers test facility (SXFEL) at Shanghai Institute of Applied Physics, Chinese Academy of Sciences (SINAP), ultra-short bunch is the crucial requirement for excellent lasing performance. It is a big challenge for deflecting cavity to measure the length of ultra-short bunch, and higher deflecting gradient is required for higher measurement resolution. X-band travelling wave deflecting structure has features of higher deflecting voltage and compact structure, which has good performance at ultra-short bunch length measurement. In this paper, a new X-band deflecting structure is designed to operate in HEM11-2,π,/3 mode. For suppressing the polarization of deflecting plane of the HEM11 mode, two symmetrical caves are added on the cavity wall to separate two polarized modes.

关键词

Keywords

HEM11Bunch lengthDipole modePolarizationTime domain

references

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