Title :
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
fDate :
6/1/2004 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830556
