RF deflecting cavity for bunch length measurement in Tsinghua Thomson scattering X-ray source

中国物理C, 2009, 33(z2): 161-164.

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7,

1.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

2.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

3.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

4.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

5.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

6.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

7.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

基金项目: 国家自然科学基金(10775080)

RF deflecting cavity for bunch length measurement in Tsinghua Thomson scattering X-ray source

SHI Jia-Ru ^1, , CHEN Huai-Bi ^2, , TANG Chuan-Xiang ^3, , HUANG Wen-Hui ^4, , DU Ying-Chao ^5, , ZHENG Shu-Xin ^6, , REN Li ^7,

1.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

2.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

3.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

4.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

5.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

6.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

7.Department of Engineering Physics,Tsinghua University,Beijing 100084,China;Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China

Keywords： RF deflecting cavity

An RF deflecting cavity used for bunch length measurement has been designed and fabricated at Tsinghua University for the Thomson Scattering X-Ray Source.The cavity is a 2856 MHz,π-mode,3-cell standing-wave cavity,to diagnose the 3.5 MeV beam produced by photocathode electron gun.With a larger power source,the same cavity will again be used to measure the accelerated beam with energy of 50 MeV before colliding with the laser pulse.The RF design using MAFIA for both the cavity shape and the power coupler is reviewed,followed by presenting the fabrication procedure and bench measurement results of two cavities.

参考文献

[1]	HE Xiao-Zhong et al.[J].HEP & NP,2006,30(zⅠ):81-83.
[2]	DU Ying-Chao,YAN Li-Xin,DU Qiang,HE Xiao-Zhong,XIANG Dao,TANG Chuan-Xiang,HUANG Wen-Hui,LIN Yu-Zheng.First Beam Measurements of the S-Band photocathode Radio-Frequency Gun at Tsinghua University[J].中国物理快报（英文版）,2007(07):1876-1878.
[3]	TANG Chuan-Xiang.Design of a Source to Supply Ultra-Fast Electron and X-Ray Pulses[A].USA:Albuquerque,2007:1046-1048.
[4]	SHI Jia-Ru,CHEN Huai-Bi,TANG Chuan-Xiang,HUANG Wen-Hui,DU Ying-Chao,ZHENG Shu-Xin,REN Li.RF deflecting cavity design for bunch length measurement of photoinjector at Tsinghua University[J].中国物理C（英文版）,2008(10):837-841.
[5]	LI D.Calculations of External Coupling to a Single Cell RF Cavity[A].USA:Chicago,1998:977-979.

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