Numerical and experimental study to fabricate the new type compact NMR device using stacked HTS bulks

S. B. Kim, T. Kimoto, Y. Yano, S. Hahn, Y. Iwasa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In fabrication of a compact NMR (Nuclear Magnetic Resonance) magnet which consists of a stacked HTS (High Temperature Superconducting) bulk annuli, generally there are three key issues: spatial homogeneity, temporal stability, strength of trapped magnetic fields. This paper presents a study on the effects of axial gap length between stacked HTS bulks on the three key issues of a bulk HTS magnet for compact HTS NMR applications. The HTS bulk magnet of which the ID and OD are 20 and 60 mm respectively has a 50 and 80 mm heights depending on the axial gap lengths between HTS bulks. The gap length between each HTS bulk varied from 0 mm to 10 mm and were used as parameters to optimize, analytically as well as experimentally, the overall field homogeneity of the HTS bulk magnet. The optimized axial gap length was obtained by analytical results, and the better magnetic field homogeneity and temporal stability of trapped magnetic field were achieved by lower magnetization field. The improved spatial homogeneity and strength of generated magnetic field by a new compact NMR magnet will be presented.

Original languageEnglish
Article number6119203
JournalIEEE Transactions on Applied Superconductivity
Volume22
Issue number3
DOIs
Publication statusPublished - Jun 25 2012

Keywords

  • Compact NMR
  • FEM analysis
  • HTS bulk annuli
  • field homogeneity
  • gap length
  • stacking method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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