Stability of bare and copper-laminated YBCO samples: experimental & simulation results

Author

Kim, Ho Min ; Jankowski, Joseph ; Lee, Haigun ; Bascuñán, Juan ; Fleshler, Steven ; Iwasa, Yukikazu

Author_Institution

MIT Francis Bitter Magnet Lab., Cambridge, MA, USA

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1290

Lastpage

1293

Abstract

In this study of stability of YBCO composite, we investigate quench/recovery behavior of YBCO test samples, bare and copper-laminated, by subjecting each test sample, immersed in a bath of liquid nitrogen boiling at 77.3 K, to a transport current pulse superimposed to a baseline DC current of 90-95% the critical current. The current pulse has an amplitude up to ∼4.5 times the critical current and a duration of 300 ms. This paper presents both experimental and simulation results showing that composite YBCO tape that incorporates a copper lamina stabilizes and to a degree protects the conductor against large over-current pulses.

Keywords

barium compounds; copper; critical current density (superconductivity); high-temperature superconductors; laminates; overcurrent protection; quenching (thermal); superconducting tapes; yttrium compounds; 300 ms; 77.3 K; YBCO composite; YBa₂Cu₃O₇; bare YBCO samples; baseline DC current; coated YBCO stability; composite YBCO tape; copper lamina; copper-laminated YBCO samples; critical current; liquid nitrogen nucleate boiling; over-current pulses; quench behavior; recovery behavior; test sample; transport current pulse; Critical current; High temperature superconductors; Nitrogen; Protection; Pulse measurements; Stability; Superconducting magnets; Testing; Voltage; Yttrium barium copper oxide; Copper lamination; liquid nitrogen nucleate boiling; stability of coated YBCO;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830556

Filename

1325035