DocumentCode :
1097957
Title :
Magnetic Flux Concentrator Using Gd-Ba-Cu-O Bulk Superconductors
Author :
Kiyoshi, T. ; Choi, S. ; Matsumoto, S. ; Asano, T. ; Uglietti, D.
Author_Institution :
Supercond. Mater. Center, Nat. Inst. for Mater. Sci., Tsukuba, Japan
Volume :
19
Issue :
3
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
2174
Lastpage :
2177
Abstract :
Magnetic flux concentration is a very important technique for the effective generation of high magnetic fields. We propose the use of the diamagnetism of a high T c bulk superconductor (HTS bulk) instead of ferromagnetic materials such as Ho and Dy. We fabricated a magnetic field concentrator using Gd-Ba-Cu-O bulk. The essential point was slits to suppress the current along the circumference. The concentrator was cooled at the center of a superconducting magnet with liquid helium. By increasing the external field to 1.00 T, a magnetic flux density of 3.20 T was obtained at the center of the concentrator. At an external field of 2.00 T, a field of 5.65 T was also obtained. A magnetic lens using HTS bulk was successfully demonstrated. The experimental results were well explained by numerical analyses assuming HTS bulk as a perfect conductor.
Keywords :
barium compounds; diamagnetism; ferromagnetic materials; gadolinium compounds; high-temperature superconductors; liquid helium; magnetic flux; numerical analysis; superconducting magnets; GdBaCuO; diamagnetism; ferromagnetic materials; high temperature bulk superconductor; liquid helium; magnetic field concentrator; magnetic flux concentrator; magnetic flux density; magnetic lens; numerical analysis; superconducting magnet; Bulk superconductor; diamagnetism; high magnetic field; magnetic lens;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2009.2018440
Filename :
5109580
Link To Document :
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