Title :
Quench and Recovery Characteristics of the Zr-Doped (Gd,Y) BCO Coated Conductor Pancake Coils Insulated With Copper and Kapton Tapes
Author :
Yang, D.G. ; Song, J.B. ; Choi, Y.H. ; Ahn, M.C. ; Na, J.B. ; Ko, T.K. ; Lee, H.G.
Author_Institution :
Dept. of Mater. Sci. & Eng., Korea Univ., Seoul, South Korea
fDate :
6/1/2011 12:00:00 AM
Abstract :
Quench protection is one of the most important issues for magnet applications using 2 G HTS tapes because of their non-self-protecting properties. Although many researchers have examined the quench/recovery characteristics of HTS magnets to establish the required stability, new information on the quench/recovery characteristics of the recently commercialized HTS magnet with GdBCO CC is needed. In this study, the quench/recovery characteristics of Zr-doped (Gd,Y)BCO CC pancake coils that were insulated with various materials, such as copper and Kapton tapes, were examined in a liquid nitrogen (LN2) bath. The minimum quench energy (MQE) and normal zone propagation (NZP) velocity of the Zr-doped (Gd,Y)BCO CC pancake coils are discussed in terms of the quench/recovery test results.
Keywords :
barium compounds; gadolinium compounds; high-temperature superconductors; superconducting coils; superconducting magnets; superconducting tapes; type II superconductors; yttrium compounds; zirconium; (GdY)BCO:Zr; 2G HTS tapes; HTS magnets; Zr-doped (Gd,Y) BCO coated conductor; copper tapes; insulated material; kapton tapes; liquid nitrogen bath; magnet applications; nonself-protecting properties; normal zone propagation velocity; pancake coils; quench protection; quench/recovery characteristics; Coils; Copper; Heat recovery; High temperature superconductors; Superconducting magnets; Temperature measurement; GdBCO; MQE; NZP; insulation; pancake coil; quench; recovery;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2090323
