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

SHI Jia-Ru; CHEN Huai-Bi; TANG Chuan-Xiang; HUANG Wen-Hui; DU Ying-Chao; ZHENG Shu-Xin; REN Li

doi:10.1088/1674-1137/33/S2/042

Chinese Physics C> 2009, Vol. 33> Issue(S2) : 161-164 DOI: 10.1088/1674-1137/33/S2/042

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

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Abstract：
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.

References

[1]

. HE Xiao-Zhong, et al. HEP NP, 2006, 30(Supp.I): 81-83. (in Chinese)2. DU Ying-Chao et al. Chinese Phys. Lett., 2007, 24: 1876-18783. TANG Chuan-Xiang et al. Design of a Source to Supply Ultra-Fast Electron and X-Ray Pulses. In: Proceedings ofPAC 2007. USA: Albuquerque, 2007. 1046-10484. SHI Jia-Ru et al. RF Deecting Cavity Design for BunchLength Measurement of Photoinjector at Tsinghua University. Chinese Phys. C, 2008, 32: 837-8415. LI D et al. Calculations of External Coupling to a Sin-gle Cell RF Cavity. In: Proceedings of LINAC 1998. USA:Chicago, 1998. 977-979

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SHI Jia-Ru, CHEN Huai-Bi, TANG Chuan-Xiang, HUANG Wen-Hui, DU Ying-Chao, ZHENG Shu-Xin and REN Li. RF deflecting cavity for bunch length measurement in Tsinghua Thomson scattering X-ray source[J]. Chinese Physics C, 2009, 33(S2): 161-164. doi: 10.1088/1674-1137/33/S2/042

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Received: 2009-01-05
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: SHI Jia-Ru,

Received Date: 2009-01-05
Accepted Date: 1900-01-01
Available Online: 2009-01-08

Abstract:

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.