Nitrogen doping experiment of 1.3 GHz superconducting cavity

Dong Chao; Sha Peng; Liu Baiqi; Li Zhongquan; Yang Jisen; Wang Honglei

doi:10.11884/HPLPB202032.190141

Volume 32 Issue 4

Mar. 2020

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Dong Chao, Sha Peng, Liu Baiqi, et al. Nitrogen doping experiment of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 045105. doi: 10.11884/HPLPB202032.190141

Citation:

Dong Chao, Sha Peng, Liu Baiqi, et al. Nitrogen doping experiment of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 045105. doi: 10.11884/HPLPB202032.190141

Dong Chao, Sha Peng, Liu Baiqi, et al. Nitrogen doping experiment of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 045105. doi: 10.11884/HPLPB202032.190141

Citation:

Dong Chao, Sha Peng, Liu Baiqi, et al. Nitrogen doping experiment of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 045105. doi: 10.11884/HPLPB202032.190141

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Nitrogen doping experiment of 1.3 GHz superconducting cavity

doi: 10.11884/HPLPB202032.190141

Dong Chao^{1, 2, 3
,},
Sha Peng^{1, 2, 3
,
,},
Liu Baiqi^{1, 2},
Li Zhongquan^{1, 2, 3},
Yang Jisen^{1, 2, 3, 4},
Wang Honglei^{1, 2, 3, 4}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
Key Laboratory of Particle Acceleration Physics and Technology, Chinese Academy of Sciences, Beijing 100049, China
3.
Center for Superconducting RF and Cryogenics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2019-05-03
Rev Recd Date: 2019-08-16
Publish Date: 2020-03-06

Abstract

Abstract

In order to greatly improve the quality factor (Q) of a Nb superconducting cavity and reduce its power loss, we performed high-temperature nitrogen doping (N-doping) on the superconducting cavity, which is the most widely used method in the world. Based on the needs of large-scale accelerators at home and abroad, the Institute of High Energy Physics, Chinese Academy of Sciences, carried out researches on 1.3 GHz 1-cell superconducting cavities, including standard post-processing and N-doping. After data analysis and comparison, it can be found that the Q values of two 1.3 GHz 1-cell fine-grain superconducting cavities have been significantly improved. At the same time, the abnormal behavior of Q value depending on acceleration gradient (E_acc) was observed in low-temperature vertical test, which is called the "anti-Q-slope" phenomenon.
- superconducting radio frequency,
- nitrogen doping,
- vertical test,
- quality factor,
- accelerating gradient

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References(10)

References

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