Fabrication of Bi-2223 HTS magnet with a superconducting switch

Author

Oh, Sang-Soo ; Ha, Hong-Soo ; Jang, Hyun-Man ; Ha, Dong Woo ; Ko, Rock Kil ; Kwon, Young Kil ; Ryu, Kang Sik ; Lee, Haigun ; Haid, Benjamin ; Iwasa, Yukikazu

Author_Institution

Korea Electrotechnol. Res. Inst., Changwon, South Korea

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1828

Lastpage

1831

Abstract

A test pancake magnet, equipped with persistent superconducting switch, was fabricated with Bi-2223/Ag-Mg tape. The magnet was operated in persistent mode at 20 and 77 K. For large operating currents that forces the magnet to operate in the flux flow range, the field decays is exponentially with time. A simple circuit model is used to compute field decay time constants. It was also found that Pb-Sn solder joints are unsuitable for persistent mode operation

Keywords

bismuth compounds; calcium compounds; magnesium; silver; strontium compounds; superconducting magnets; superconducting switches; superconducting tapes; 20 K; 77 K; Bi-2223 HTS magnet; Bi-2223/Ag-Mg tape; Bi₂Sr₂Ca₂Cu₃O-Ag-Mg; Pb-Sn; Pb-Sn solder joints; circuit model; field decay time constants; flux flow range operation; large operating currents; pancake magnet; persistent superconducting switch; superconducting switch; Circuits; Fabrication; High temperature superconductors; Magnetic flux; Magnetic switching; Soldering; Superconducting films; Superconducting magnets; Switches; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.920203

Filename

920203