Experimental apparatus for critical current measurement above 5 K using Bi-based oxide current leads

Author

Hasebe, T. ; Mitsubori, H. ; Sakuraba, J. ; Ishihara, Manabu ; Awaji, S. ; Watanabe, K.

Author_Institution

Sumitomo Heavy Ind. Ltd., Kanagawa, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

707

Lastpage

710

Abstract

Experimental apparatus for the measurement of temperature dependence of critical current within a strong magnetic field has been developed. Samples, which are tested by the four probe method are cooled by a Gifford-McMahon (GM) type cryocooler to the lowest temperature of 5 K. The sample holder has a diameter of 70 mm and a height of 70 mm. Transport currents, up to 150 A, are supplied to two samples through Bi-based oxide superconducting current leads. An external magnetic field of up to 15 T, which is applied to the samples perpendicular to the sample axis, is generated by a water cooled single Bitter magnet with a room temperature bore of 82 mm. As a performance test, the critical current properties of a silver clad Bi-based oxide tape have been measured at 5.5 K, 30 K and 50 K within a magnetic field up to 15 T. This experiment has demonstrated the validity of this experimental apparatus.

Keywords

bismuth compounds; critical currents; cryostats; electric current measurement; high-temperature superconductors; probes; superconducting cables; 15 T; 30 K; 5.5 K; 50 K; 82 mm; Bi-based oxide superconducting current leads; Bitter magnet; critical current measurement; critical current properties; four probe method; high-temperature superconductors; performance test; strong magnetic field; Critical current; Current measurement; Lead compounds; Magnetic field measurement; Magnetic fields; Probes; Superconducting magnets; Temperature dependence; Temperature measurement; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614602

Filename

614602