Fabrication of Bi-2212/Ag magnets for high magnetic field applications

Author

Okada, M. ; Tanaka, K. ; Wakuda, T. ; Ohata, K. ; Sato, J. ; Kumakura, H. ; Kiyoshi, T. ; Kitaguchi, H. ; Togano, K. ; Wada, H.

Author_Institution

Res. Lab., Hitachi Ltd., Ibaraki, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

920

Lastpage

923

Abstract

Bi-2212/Ag multifilamentary tapes show practical transport properties in high magnetic field regions above 20 T and 4.2 K, where it is considered difficult to use metallic superconductors. In this paper, the recent progress of the authors´ development for the Bi-2212/Ag insert magnets is presented. The Bi-2212/Ag stacked double pancake coils with a 45-150 mm outer diameter, 15-55 mm inner diameter and 50-220 mm in height have been fabricated and tested in various backup magnetic fields up to 20 T at the Tsukuba Magnet Laboratory of NRIM. A high resolution X-ray CT apparatus was used to observe a cross section of the magnet nondestructively. The transport properties of the magnets are discussed in relation to the defects of the coil identified by this X-ray CT observation.

Keywords

bismuth compounds; calcium compounds; copper compounds; high-temperature superconductors; magnetic fields; multifilamentary superconductors; silver; strontium compounds; superconducting magnets; superconducting tapes; 15 to 65 mm; 20 T; 4.2 K; 45 to 150 mm; 50 to 220 mm; Bi-2212/Ag insert magnets; BiSr/sub 2/Ca/sub 2/CuO/sub 2/-Ag; BiSr/sub 2/Ca/sub 2/CuO/sub 2/-Ag HTSC magnets fabrication; backup magnetic fields; high magnetic field applications; high resolution X-ray CT apparatus; multifilamentary tapes; stacked double pancake coils; transport properties; Fabrication; Laboratories; Magnetic fields; Magnetic properties; Multifilamentary superconductors; Silver; Superconducting coils; Superconducting magnets; Superconductivity; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783447

Filename

783447