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Design, fabrication, and cold-test results of C-band spherical RF pulse compressor prototype

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Radiation Detection Technology and Methods Aims and scope Submit manuscript

Abstract

Purpose

Pulse compressor is a useful and common RF structure for Free Electron Laser and Linear Collider Facilities, which can improve the input power of accelerating structures significantly.

Methods

In this study, we designed, fabricated and tested a prototype of a compact C-band spherical pulse compressor. This pulse compressor utilizes one high Q0 spherical RF resonant cavity that works with two degenerated TE1,1,3 modes and a dual-mode polarized coupler. The cavity and coupler were designed and machined separately and then brazed together. The prototype was tested carefully using vector network analyzer, and a cold-test system was set up to check the working conditions of the spherical pulse compressor with inversed input power

Results

Associated with the C-band high-gradient accelerating structures, the peak power gain and energy multiply factor can be as high as 6.1 and 1.85, respectively, in theory. The average power gain is 3.8 in the first 0.372 μs after the phase reverse, which is the accelerator filling time. During the cold test, a peak power multiply factor of 6.04 and an energy multiply factor of 1.83 were achieved.

Conclusions

The test results agreed with the design well. The prototype was successfully made as a pre-research for the future energy multiplying scheme of SXFEL.

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Zong-Bin Li, Wen-Cheng Fang, Qiang Gu, Jian-Hao Tan, Xiao-Xia Huang & Zhen-Tang Zhao

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Zong-Bin Li

Authors
  1. Zong-Bin Li
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  2. Wen-Cheng Fang
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  3. Qiang Gu
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  4. Jian-Hao Tan
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  5. Xiao-Xia Huang
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  6. Zhen-Tang Zhao
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Corresponding authors

Correspondence to Wen-Cheng Fang or Zhen-Tang Zhao.

Additional information

This work is supported by the National Natural Science Foundation of China (No. 11675249).

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Li, ZB., Fang, WC., Gu, Q. et al. Design, fabrication, and cold-test results of C-band spherical RF pulse compressor prototype. Radiat Detect Technol Methods 3, 21 (2019). https://doi.org/10.1007/s41605-019-0100-8

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  • DOI: https://doi.org/10.1007/s41605-019-0100-8

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