Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 19, Issue 3, Pages 2285-2288Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2009.2018809
Keywords
Double-pancake coils; field homogeneity; HTS insert; LTS/HTS NMR magnet; nonlinear behavior of a shim coil; screening-current-induced field
Funding
- NIH National Center for Research Resources
Ask authors/readers for more resources
This paper reports results, experimental and analytical, of the nonlinear behavior of a shim coil in the presence of an HTS coil assembled with double-pancake (DP) HTS-tape coils. The experimental results are from: 1) operation of a 700MHz LTS/HTS NMR magnet (LH700) consisting of a 600 MHz LTS NMR magnet (L600) equipped with superconducting shim coils and a 100 MHz DP-assembled HTS insert (H100) and; 2) an experiment with a room-temperature (RT) shim coil coupled to a 50 MHz DP-assembled HTS insert (H50). Afield mapping theory with a harmonic analysis is applied to interpret both results. Based on experimental results and analyses, we conclude that the screening-current-induced field (SCF) generated by a DP-assembled HTS insert is primarily responsible for the nonlinear behavior, including strength degradation, of a shim coil.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available