AC Loss and Temperature Rise at CIC Conductor Joint in EF Coil of JT-60SA

Author

Takao, Tomoaki ; Masuda, Tomoaki ; Mitsui, Satoshi ; Nakamura, Kazuya ; Murakami, Haruyuki ; Yoshida, Kiyoshi

Author_Institution

Fac. of Sci. & Technol., Sophia Univ., Tokyo, Japan

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

503

Lastpage

507

Abstract

Japan and EU are promoting the project that the coils in JT-60 installed in Japan Atomic Energy Agency are changed to superconducting coils. We numerically and experimentally evaluate thermal stability of a conductor joint in the planning superconducting coil (EF coil). We measured an AC loss of the prototype joint, and estimated the coupling time constant. The AC loss at the EF coils joint segment was calculated based on the coupling time constant and the magnetic field distribution. Moreover, the temperature rise due to the AC loss was numerically derived. The calculation result showed that the temperature rise was small and the coil was enough stable.

Keywords

conductors (electric); magnetic fields; superconducting coils; superconducting magnets; temperature distribution; thermal stability; AC loss; CIC conductor joint; EF coils joint segment; JT-60SA; Japan Atomic Energy Agency; coupling time constant; magnetic field distribution; prototype joint; superconducting coils; temperature rise; thermal stability; AC loss; JT-60SA; conductor joint; equilibrium field coil; stability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2039122

Filename

5411943