Fabrication of NbTi superconducting joints for 400-MHz NMR application

Junsheng Cheng; Jianhua Liu; Zhipeng Ni; Chunyan Cui; Shunzhong Chen; Shousen Song; Lankai Li; Yinming Dai; Qiuliang Wang

doi:10.1109/TASC.2012.2185795

Fabrication of NbTi superconducting joints for 400-MHz NMR application

Junsheng Cheng
, Jianhua Liu
, Zhipeng Ni
, Chunyan Cui
, Shunzhong Chen
, Shousen Song
, Lankai Li
, Yinming Dai
, Qiuliang Wang

School of Electrical Engineering

CAS - Institute of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

NbTi superconducting joints (SJs) for a 400-MHz nuclear magnetic resonance (NMR) magnet system were fabricated using the superconducting solder matrix replacement in an open-air condition. A detection device for testing the resistance of SJ has been established. The results show that the overall resistance of SJs is 9.58 × 10 ^-12 Ω under the background field of 1 T by summation of individual joint resistance. The resistance of SJs and the capability for current load should meet the demands of the NMR system. The SJs are placed inside the cylindrical vessel above the magnet. The magnetic flux inside the top of the vessel is no more than 0.3 T to assure performance of joints. As results, there is only 0.0001 ppm for homogeneity deviation caused by SJs on this NMR system, and therefore, the negative effect is negligible.

Original language	English
Article number	6164226
Journal	IEEE Transactions on Applied Superconductivity
Volume	22
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2012.2185795
State	Published - Apr 2012

Keywords

Nuclear magnetic resonance (NMR) spectrometer
solder
superconducting joint (SJ)
superconducting magnet

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10.1109/TASC.2012.2185795

Cite this

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title = "Fabrication of NbTi superconducting joints for 400-MHz NMR application",

abstract = "NbTi superconducting joints (SJs) for a 400-MHz nuclear magnetic resonance (NMR) magnet system were fabricated using the superconducting solder matrix replacement in an open-air condition. A detection device for testing the resistance of SJ has been established. The results show that the overall resistance of SJs is 9.58 {\texttimes} 10 -12 Ω under the background field of 1 T by summation of individual joint resistance. The resistance of SJs and the capability for current load should meet the demands of the NMR system. The SJs are placed inside the cylindrical vessel above the magnet. The magnetic flux inside the top of the vessel is no more than 0.3 T to assure performance of joints. As results, there is only 0.0001 ppm for homogeneity deviation caused by SJs on this NMR system, and therefore, the negative effect is negligible.",

keywords = "Nuclear magnetic resonance (NMR) spectrometer, solder, superconducting joint (SJ), superconducting magnet",

author = "Junsheng Cheng and Jianhua Liu and Zhipeng Ni and Chunyan Cui and Shunzhong Chen and Shousen Song and Lankai Li and Yinming Dai and Qiuliang Wang",

year = "2012",

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doi = "10.1109/TASC.2012.2185795",

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T1 - Fabrication of NbTi superconducting joints for 400-MHz NMR application

AU - Cheng, Junsheng

AU - Liu, Jianhua

AU - Ni, Zhipeng

AU - Cui, Chunyan

AU - Chen, Shunzhong

AU - Song, Shousen

AU - Li, Lankai

AU - Dai, Yinming

AU - Wang, Qiuliang

PY - 2012/4

Y1 - 2012/4

N2 - NbTi superconducting joints (SJs) for a 400-MHz nuclear magnetic resonance (NMR) magnet system were fabricated using the superconducting solder matrix replacement in an open-air condition. A detection device for testing the resistance of SJ has been established. The results show that the overall resistance of SJs is 9.58 × 10 -12 Ω under the background field of 1 T by summation of individual joint resistance. The resistance of SJs and the capability for current load should meet the demands of the NMR system. The SJs are placed inside the cylindrical vessel above the magnet. The magnetic flux inside the top of the vessel is no more than 0.3 T to assure performance of joints. As results, there is only 0.0001 ppm for homogeneity deviation caused by SJs on this NMR system, and therefore, the negative effect is negligible.

AB - NbTi superconducting joints (SJs) for a 400-MHz nuclear magnetic resonance (NMR) magnet system were fabricated using the superconducting solder matrix replacement in an open-air condition. A detection device for testing the resistance of SJ has been established. The results show that the overall resistance of SJs is 9.58 × 10 -12 Ω under the background field of 1 T by summation of individual joint resistance. The resistance of SJs and the capability for current load should meet the demands of the NMR system. The SJs are placed inside the cylindrical vessel above the magnet. The magnetic flux inside the top of the vessel is no more than 0.3 T to assure performance of joints. As results, there is only 0.0001 ppm for homogeneity deviation caused by SJs on this NMR system, and therefore, the negative effect is negligible.

KW - Nuclear magnetic resonance (NMR) spectrometer

KW - solder

KW - superconducting joint (SJ)

KW - superconducting magnet

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DO - 10.1109/TASC.2012.2185795

M3 - 文章

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SN - 1051-8223

VL - 22

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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M1 - 6164226

ER -

Fabrication of NbTi superconducting joints for 400-MHz NMR application

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Keywords

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