A Study on Normal Zone Propagation Behavior of Partially Insulated GdBCO Coil

Author

Hyun-Jin Shin ; Kwang Lok Kim ; Yoon Hyuck Choi ; Donggyu Yang ; Young-Gyun Kim ; Haigun Lee

Author_Institution

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

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

This paper reports the quench initiation and propagation characteristics of two GdBCO single-pancake coils, one wound with Kapton tape every two turns and the other completely wound with Kapton tape, to investigate the effect of a partial insulation (PI) winding technique. The thermal/electrical stabilities of the PI coil were improved by turn-to-turn contacts between the partially uninsulated turns, leading to an increased minimum quench energy. Furthermore, transverse normal zone propagation velocities of the PI coil increased because local heat was well transferred through uninsulated turns during quench events.

Keywords

barium compounds; gadolinium compounds; high-temperature superconductors; quenching (thermal); superconducting coils; thermal stability; GdBCO single-pancake coils; GdBaCuO; Kapton tape; electrical stability; local heat; minimum quench energy; normal zone propagation behavior; partial insulation winding technique effect; partially insulated GdBCO coil; partially uninsulated turns; quench initiation; quench propagation; thermal stability; transverse normal zone propagation velocities; turn-to-turn contacts; Coils; Heating; High-temperature superconductors; Insulation; Integrated circuits; Testing; Thermal stability; GdBCO; minimum quench energy; normal zone propagation velocity; partial insulation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2363031

Filename

6922490