Title :
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
fDate :
3/1/2001 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
