1. Field Measurement and Analysis of a 3 T 66 mm No-Insulation HTS NMR Magnet With Screening Current and Manufacturing Uncertainty Considered
- Author
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Jeseok Bang, SangGap Lee, Min Cheol Ahn, Jaemin Kim, Young Jin Hwang, Jae Young Jang, Jung Tae Lee, Mincheol Cho, Seungyong Hahn, and Seokho Kim
- Subjects
Superconductivity ,Nmr magnet ,Materials science ,Full field ,Condensed Matter Physics ,01 natural sciences ,Homogenization (chemistry) ,Electronic, Optical and Magnetic Materials ,Computational physics ,Magnetic field ,Electromagnetic coil ,Magnet ,0103 physical sciences ,Electrical and Electronic Engineering ,010306 general physics - Abstract
This paper reports calculation and measurement of magnetic fields from a 3 T 66-mm room-temperature bore no-insulation high-temperature superconductor nuclear magnetic resonance (NMR) magnet with screening current and manufacturing uncertainty considered. The magnet reached its full field, 3 T under a conduction-cooling environment at 17 K. The measured magnetic fields along the magnet axis showed a substantial discrepancy to the originally designed ones. In simulation, measured dimensions of the 66 total single pancake coils of the magnet were used in consideration of the manufacturing errors of each pancake coil. And, the two-dimensional edge-element method with the domain homogenization technique was adopted to simulate screening currents within pancake coils and calculate the consequent screening current induced fields. The normalized magnetic fields between simulation and measurement showed good agreement that implies a potential to calculate “actual” magnetic fields of an REBCO NMR magnet with our approach.
- Published
- 2019