Title :
Stability and quenching in high-temperature superconductors
Author :
Iwasa, Y. ; Lim, H. ; Yunus, M.I.
Author_Institution :
Francis Bitter Nat. Magnet Lab., MIT, Cambridge, MA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Two experiments, both on stability and protection issues for high-temperature superconducting (HTS) magnets, are described. Each experiment, with a silver-sheathed BiPbSrCaCuO(2223) tape test sample cooled by a cryocooler, covers the temperature range 20/spl sim/50 K in a zero magnetic field. In this paper, preliminary results on normal zone propagation are presented. Experiment 1 measures normal zone propagation in both longitudinal and transverse directions in a 3-layer test pancake coil; experiment 2 measures temperature distributions, both spatial and temporal, along a length of a conductor undergoing quenching in the longitudinal direction. These results are consistent with those of a simulation code.<>
Keywords :
high-temperature superconductors; protection; stability; superconducting coils; superconducting magnets; temperature distribution; testing; thermal analysis; thermal stability; 20 to 50 K; BiPbSrCaCuO; high-temperature superconductors; normal zone propagation; protection; quenching; stability; superconducting magnets; temperature distributions; test pancake coil; zero magnetic field; Coils; High temperature superconductors; Length measurement; Magnetic field measurement; Protection; Stability; Superconducting films; Superconducting magnets; Temperature distribution; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
