Analysis of superconducting cavity quench events at SSRF

HOU Hong-Tao; LIU Jian-Fei; ZHAO Yu-Bin; ZHAO Shen-Jie; ZHANG Zhi-Gang; LUO Chen; FENG Zi-Qiang; MAO Dong-Qing; ZHENG Xiang; LI Zheng

doi:10.1088/1674-1137/35/2/014

Chinese Physics C> 2011, Vol. 35> Issue(2) : 179-182 DOI: 10.1088/1674-1137/35/2/014

Analysis of superconducting cavity quench events at SSRF

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Abstract：
Quench is important and dangerous to superconducting RF cavities. This paper illustrates the mechanism of quench and how a quench detector works, and analyzes the quench events happening during beam operations and cavity conditioning. We find that the quench protection is mostly triggered by some reasons such as fluctuation of cavity voltage, multipacting or arc, rather than a real cavity thermal breakdown. The results will be beneficial to optimize the operation parameters of superconducting cavities, to discover the real reasons for beam trip by quench interlock, and to improve the operation stability of superconducting RF systems.

References

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Knobloch J. Advanced Thermometry Studies of Super-conducting Radio-Frequency Cavities, PhD thesis, Cornell University, Ithaca, 19972 Padamsee H, Knobloch J, Hays T. RF superconductivity for Accelerators. New York: John Wiley, 19983 ZHAO Yu-Bin, YIN Cheng-Ke, ZHANG Tong-Xuan et al. Chinese Physics C, 2008, 32: 7584 HOU Hong-Tao, ZHAO Shen-Jie, LUO Chen et al. Nuclear Science and Techniques, 2009, 20: 261

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HOU Hong-Tao, LIU Jian-Fei, ZHAO Yu-Bin, ZHAO Shen-Jie, ZHANG Zhi-Gang, LUO Chen, FENG Zi-Qiang, MAO Dong-Qing, ZHENG Xiang and LI Zheng. Analysis of superconducting cavity quench events at SSRF[J]. Chinese Physics C, 2011, 35(2): 179-182. doi: 10.1088/1674-1137/35/2/014

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Received: 2010-05-05
Revised: 2010-06-02

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of superconducting cavity quench events at SSRF

Received Date: 2010-05-05

Accepted Date: 2010-06-02

Available Online: 2011-02-05

Abstract: Quench is important and dangerous to superconducting RF cavities. This paper illustrates the mechanism of quench and how a quench detector works, and analyzes the quench events happening during beam operations and cavity conditioning. We find that the quench protection is mostly triggered by some reasons such as fluctuation of cavity voltage, multipacting or arc, rather than a real cavity thermal breakdown. The results will be beneficial to optimize the operation parameters of superconducting cavities, to discover the real reasons for beam trip by quench interlock, and to improve the operation stability of superconducting RF systems.

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Analysis of superconducting cavity quench events at SSRF

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