Construction of a strong magnetic field generator with use of melt-processed bulk superconductors

Author

Oka, T. ; Yokoyama, K. ; Itoh, Y. ; Ikuta, H. ; Mizutani, U. ; Okada, H. ; Katagiri, K. ; Noto, K.

Author_Institution

Iwate Ind. Promotion Center, Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1584

Lastpage

1587

Abstract

A superconducting permanent magnet system capable of generating strong magnetic fields has been constructed by using melt-processed bulk superconductors as trapped field magnets. The trapped field in the open space between two magnetic poles that are set face to face has reached 3.15 T when magnetized by a pulsed-field magnetization (PFM) technique. That was operated at 30 K attained by GM-cycle refrigerators. The performance exceeds that of conventional rare earth magnets or large scale electromagnets by far. It was found that the iteratively magnetizing pulsed field operation with reducing amplitude (IMRA) method is very effective in magnetizing the bulk superconductors. The magnet system can be used as a high field generator in various applications.

Keywords

magnetic fields; magnetisation; permanent magnets; superconducting magnets; 3.15 T; 30 K; Gifford-McMahon cycle refrigerator; IMRA method; melt-processed bulk superconductor; pulsed field magnetization; strong magnetic field generator; superconducting permanent magnet; trapped field magnet; Large-scale systems; Magnetic fields; Magnetic flux; Magnetic materials; Magnetization; Magnetostatics; Permanent magnets; Refrigerators; Superconducting magnets; Superconductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.812796

Filename

1211904