An essential challenge in seal design is to provide an ultra-low leak rate at cryogenic temperatures and high pressures. In this paper, the performance of demountable indium seals under a charging pressure of 8.5 MPa A and at cryogenic temperatures down to −190 °C was investigated. Three indium seal structures with a diameter of 30 mm were specifically designed and tested. All three structures went through both room temperature and cryogenic temperature tests in cycles with a pressure of up to 8.5 MPa A. In addition, leak rate experiments regarding the creep relaxation effect of the indium ring were conducted. The results showed that the leak rates of all three structures were lower than 1 × 10−10 Pa m3 s−1 at both room temperature and cryogenic temperature with the pressure up to 8.5 MPa A when the torque was 8 or 12 N m. It was concluded that the linear loads for achieving a successful indium seal were 163, 171, and 220 N mm−1 alongside its circumference for the 2 mm indium M-T structure, the 3 mm indium M-T structure, and the Z-shaped seal structure, respectively. Furthermore, although the torque slightly dropped after the assembly due to the creep relaxation effect, the leak rates of the structure were still lower than 1 × 10−10 Pa m3 s−1 three days after the assembly. The present work is helpful for designing ultra-low leak rate demountable indium seals at cryogenic temperatures and high pressures.
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September 2021
Research Article|
September 13 2021
Performance of cryogenic demountable indium seal at high pressures Available to Purchase
Xiuli Wang
;
Xiuli Wang
1
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University
, Shanghai 200240, China
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Shu Li;
Shu Li
a)
1
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University
, Shanghai 200240, China
a)Author to whom correspondence should be addressed: [email protected]
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Yonglin Ju
;
Yonglin Ju
a)
1
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University
, Shanghai 200240, China
a)Author to whom correspondence should be addressed: [email protected]
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Zhuoqun Lei;
Zhuoqun Lei
1
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University
, Shanghai 200240, China
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Jianglai Liu;
Jianglai Liu
2
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Key Laboratory for Particle Astrophysics and Cosmology (MOE), School of Physics and Astronomy, Shanghai Jiao Tong University
, Shanghai 200240, China
3
Shanghai Jiao Tong University Sichuan Research Institute
, Chengdu 610000, China
4
Tsung-Dao Lee Institute, Shanghai Jiao Tong University
, Shanghai 200240, China
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Xiangdong Ji
;
Xiangdong Ji
2
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Key Laboratory for Particle Astrophysics and Cosmology (MOE), School of Physics and Astronomy, Shanghai Jiao Tong University
, Shanghai 200240, China
3
Shanghai Jiao Tong University Sichuan Research Institute
, Chengdu 610000, China
4
Tsung-Dao Lee Institute, Shanghai Jiao Tong University
, Shanghai 200240, China
5
Department of Physics, University of Maryland
, College Park, Maryland 20742, USA
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Xuefeng Tang;
Xuefeng Tang
6
Chengdu Xinliantong Cryogenic Equipment Co., Ltd.
, Chengdu 610200, China
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Yonghua Gou
Yonghua Gou
6
Chengdu Xinliantong Cryogenic Equipment Co., Ltd.
, Chengdu 610200, China
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Xiuli Wang
1
Shu Li
1,a)
Yonglin Ju
1,a)
Zhuoqun Lei
1
Jianglai Liu
2,3,4
Xiangdong Ji
2,3,4,5
Xuefeng Tang
6
Yonghua Gou
6
1
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University
, Shanghai 200240, China
2
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, Key Laboratory for Particle Astrophysics and Cosmology (MOE), School of Physics and Astronomy, Shanghai Jiao Tong University
, Shanghai 200240, China
3
Shanghai Jiao Tong University Sichuan Research Institute
, Chengdu 610000, China
4
Tsung-Dao Lee Institute, Shanghai Jiao Tong University
, Shanghai 200240, China
5
Department of Physics, University of Maryland
, College Park, Maryland 20742, USA
6
Chengdu Xinliantong Cryogenic Equipment Co., Ltd.
, Chengdu 610200, China
a)Author to whom correspondence should be addressed: [email protected]
Rev. Sci. Instrum. 92, 093905 (2021)
Article history
Received:
March 24 2021
Accepted:
August 26 2021
Citation
Xiuli Wang, Shu Li, Yonglin Ju, Zhuoqun Lei, Jianglai Liu, Xiangdong Ji, Xuefeng Tang, Yonghua Gou; Performance of cryogenic demountable indium seal at high pressures. Rev. Sci. Instrum. 1 September 2021; 92 (9): 093905. https://doi.org/10.1063/5.0051279
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