Magnetic flux expulsion effect of 1.3 GHz superconducting cavity

Mi Zhenghui; Yang Jisen; Sha Peng; Dong Chao; Wang Honglei; Zhai Jiyuan; Lin Haiying; Zheng Hongjuan; Liu Baiqi; Sun Liangrui; Zhang Xiangzhen; He Feisi; Pan Weimin

doi:10.11884/HPLPB202032.190398

Volume 32 Issue 6

May 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(6): 064003

Mi Zhenghui, Yang Jisen, Sha Peng, et al. Magnetic flux expulsion effect of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 064003. doi: 10.11884/HPLPB202032.190398

Citation:

Mi Zhenghui, Yang Jisen, Sha Peng, et al. Magnetic flux expulsion effect of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 064003. doi: 10.11884/HPLPB202032.190398

Mi Zhenghui, Yang Jisen, Sha Peng, et al. Magnetic flux expulsion effect of 1.3 GHz superconducting cavity[J]. High Power Laser and Particle Beams, 2020, 32: 064003. doi: 10.11884/HPLPB202032.190398

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Magnetic flux expulsion effect of 1.3 GHz superconducting cavity

doi: 10.11884/HPLPB202032.190398

Mi Zhenghui^{1, 2
,},
Yang Jisen^{1, 2},
Sha Peng^{1, 2
,
,},
Dong Chao^{1, 2},
Wang Honglei^{1, 2},
Zhai Jiyuan^{1, 2},
Lin Haiying^{1, 2},
Zheng Hongjuan^{1, 2},
Liu Baiqi^{1, 2},
Sun Liangrui^{1, 2},
Zhang Xiangzhen^{1, 2},
He Feisi^{1, 2},
Pan Weimin^{1, 2, 3}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2019-10-09
Rev Recd Date: 2019-12-21
Publish Date: 2020-05-12

Abstract

Abstract

The research of magnetic flux expulsion of 1.3 GHz single-cell superconducting cavity has been carried out with a new set of high precision magnetic measuring and compensating system, combining with 2 K vertical test system of IHEP. The magnetic field at the equator of cavity can be measured with the system and compensated to less than 5.0×10⁻⁸ T. The magnetic flux expulsion effect of superconducting cavity under different surface temperature gradient is measured and analyzed. The rf performance of the cavity pinned with magnetic flux is tested, and the sensitivity of superconducting cavity resistance to magnetic flux pinning and the surface resistance of superconducting cavity under different electric field gradients are studied accordingly. The results show that the developed high precision magnetic field measuring and compensating system can meet the research needs of magnetic flux expulsion of superconducting cavity. Higher surface temperature gradient of superconducting cavity is beneficial to the magnetic flux expulsion. The sensitivity of flux pinning resistance increases with the increase of electric field. The research has also laid a foundation for the development of superconducting cavity.
- superconducting niobium cavity,
- magnetic flux expulsion,
- surface resistance,
- radio frequency superconductivity,
- Helmholtz coil

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References(10)

References

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