High Magnetic Field Superconducting Magnet With Zero Helium Boil-Off for Nuclear Magnetic Resonance Spectrometer

A superconducting magnet was designed based on the requirements of high magnetic field nuclear magnetic resonance. The superconducting coils are fabricated with the various diameters of superconducting wire to improve the performance and reduce the weight in the magnet. The superconducting magnet wi...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2010-06, Vol.20 (3), p.748-751
Main Authors: Huang, Hou-Cheng, Cheng, Junsheng, Li, Yi, Zhang, Hongjie, Dong, Zengren, Wang, Jianghua
Format: Article
Language:English
Subjects:
Applied sciences
Coils
Electrical engineering. Electrical power engineering
Electromagnets
Electronics
Exact sciences and technology
Helium
High homogeneous magnet
Liquid helium
Magnetic fields
Magnetic resonance
Magnetic shielding
Materials
Miscellaneous
Nuclear magnetic resonance
PTR
quench band
re-condensed liquid helium
Refrigeration
Refrigerators
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Spectrometers
Spectroscopy
Superconducting coils
Superconducting devices
Superconducting filaments and wires
Superconducting magnets
Superconductivity
Various equipment and components
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Summary:A superconducting magnet was designed based on the requirements of high magnetic field nuclear magnetic resonance. The superconducting coils are fabricated with the various diameters of superconducting wire to improve the performance and reduce the weight in the magnet. The superconducting magnet with the available-bore of ¿54 mm and center field of 11.75 T is cooled by the liquid helium. To reduce the liquid helium evaporation, a two-stage 4 K pulsed tube refrigerator is employed to cool the system. The actively shielded magnet has a high pure copper quench band to reduce stray field burst during a quench of the shield superconducting coil. The paper presents the electromagnetic design, and stress and protection in detail.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2042587