Measurement of superconductor motion in R&D coil for supercooling of the LHD helical coil

Author

Nishimura, Arata ; Mito, Toshiyuki ; Yamada, Shuichi ; Imagawa, Shinsaku ; Takahata, Kazuya ; Yanagi, Nagato ; Chikaraishi, Hirotaka ; Tamura, Hitoshi ; Iwamoto, Akifumi ; Hamaguchi, Shinji ; Hishinuma, Yoshimitsu ; Nyilas, Arman

Author_Institution

National Inst. for Fusion Sci., Toki, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1515

Lastpage

1518

Abstract

A superconducting solenoid coil was constructed using a large-scale superconductor to investigate the stability of helical coil in the Large Helical Device. The coil was cooled down to 3.2-4.4 K and current of 13 kA was put in. Superconductor motion was detected directly with a high sensitivity displacement gage. At the center of the magnet, the conductor expanded to outside stably, but the conductor at the corner showed contrary and incomprehensible behavior expected the conductor rotation due to mismatching to the magnetic field.

Keywords

electromagnetic forces; fusion reactor design; stellarators; superconducting coils; superconducting magnets; supercooling; 13 kA; LHD helical coil; Large Helical Device; R&D coil; conductor rotation; displacement gage; displacement measurement; electromagnetic forces; helical coil stability; high sensitivity; magnetic field mismatch; superconducting magnets; superconducting solenoid coil; superconductor motion detection; superconductor motion measurement; supercooling; Conductors; Large-scale systems; Magnetic fields; Motion detection; Motion measurement; Research and development; Solenoids; Stability; Superconducting coils; Superconducting magnets; Displacement measurement; electromagnetic forces; superconducting magnets; superconductor motion;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830677

Filename

1325086