The characteristics of spatial homogeneity and strength of magnetic field for compact NMR magnets using stacked HTS bulks with various gap lengths

Seok Beom Kim, T. Kimoto, M. Imai, Y. Yano, J. H. Joo, S. Hahn, Y. Iwasa, M. Tomita

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A compact nuclear magnetic resonance (NMR) magnet is one of the new applications after a technique to enhance maximum trapped field of an high temperature superconducting (HTS) bulk. In design of a compact NMR magnet which consists of the stacked HTS bulk annuli, the issues of strength, spatial homogeneity and temporal stability by trapped magnetic fields are very important. This paper presents a study on the effects of magnetization field strength and gap length between stacked bulks for the compact HTS bulk NMR applications. Four-stacked HTS bulk magnet with ID 20 mm and OD 60 mm was prepared to investigate the optimized configuration. The thickness of each HTS bulk is 5 mm, and the gap lengths from 0 mm to 10 mm were used as parameters in analysis and experiment, respectively. Four-stacked HTS bulk magnets with various gap lengths were tested at two different background magnetic fields of 0.5 T and 2 T at 77 K. The optimized axial gap length was found out by analytical results, and the better magnetic field homogeneity and temporal decay property of trapped magnetic field were obtained by lower magnetization field in this experiments.

Original languageEnglish
Pages (from-to)1454-1458
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 2011

Fingerprint

homogeneity
Magnets
magnets
Nuclear magnetic resonance
Magnetic fields
nuclear magnetic resonance
magnetic fields
trapped magnetic fields
Temperature
Magnetization
magnetization
annuli
field strength
Experiments
decay
configurations

Keywords

  • Axial gap length
  • Compact NMR
  • HTS bulk annuli

ASJC Scopus subject areas

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

Cite this

The characteristics of spatial homogeneity and strength of magnetic field for compact NMR magnets using stacked HTS bulks with various gap lengths. / Kim, Seok Beom; Kimoto, T.; Imai, M.; Yano, Y.; Joo, J. H.; Hahn, S.; Iwasa, Y.; Tomita, M.

In: Physica C: Superconductivity and its Applications, Vol. 471, No. 21-22, 11.2011, p. 1454-1458.

Research output: Contribution to journalArticle

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