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 language | English |
|---|---|
| Pages (from-to) | 1454-1458 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 471 |
| Issue number | 21-22 |
| DOIs | |
| Publication status | Published - Nov 2011 |
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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 journal › Article
}
TY - JOUR
T1 - The characteristics of spatial homogeneity and strength of magnetic field for compact NMR magnets using stacked HTS bulks with various gap lengths
AU - Kim, Seok Beom
AU - Kimoto, T.
AU - Imai, M.
AU - Yano, Y.
AU - Joo, J. H.
AU - Hahn, S.
AU - Iwasa, Y.
AU - Tomita, M.
PY - 2011/11
Y1 - 2011/11
N2 - 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.
AB - 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.
KW - Axial gap length
KW - Compact NMR
KW - HTS bulk annuli
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UR - http://www.scopus.com/inward/citedby.url?scp=80055004695&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2011.05.215
DO - 10.1016/j.physc.2011.05.215
M3 - Article
AN - SCOPUS:80055004695
VL - 471
SP - 1454
EP - 1458
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 21-22
ER -