The Effect of Bobbin Material on the Thermal Stability of a Conduction-Cooled HTS Racetrack Coil

Author

Oh Jun Kwon ; Dong Gyu Yang ; Jongseok Lee ; Jung-Bin Song ; Jiho Lee ; Tae Kuk Ko ; Haigun Lee

Author_Institution

Dept. of Mater. Sci. & Eng., Korea Univ., Seoul, South Korea

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

The quench and recovery characteristics of two GdBCO-coated conductor racetrack coils, one wound onto a high-strength aluminum (AL 6061-T6) bobbin and the other wound onto an oxygen-free high-conductivity (OFHC) copper bobbin, were evaluated to investigate the effect of bobbin material on the thermal stability of the HTS racetrack coil. The test results show that the minimum quench energy values of the coil wound onto the OFHC copper bobbin were larger than those of the coil wound onto the AL 6061-T6 bobbin. Furthermore, in the case of the coil wound onto the OFHC copper bobbin, the voltage signals increased more slowly compared to the coil wound onto the AL bobbin, and the recovery time was much shorter after a hot spot was generated by a heater. Overall, the coil wound onto the OFHC copper bobbin exhibited better thermal stability due to its superior thermal diffusivity.

Keywords

gadolinium compounds; high-temperature superconductors; quenching (thermal); superconducting coils; thermal stability; Bobbin material; GdBCO; conduction-cooled HTS; oxygen-free high-conductivity; racetrack coil; thermal stability; Coils; Copper; High-temperature superconductors; Thermal conductivity; Thermal stability; Wounds; Bobbin material; high-temperature superconducting (HTS) racetrack coil; quench and recovery characteristic; thermal stability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2295038

Filename

6684303