Title :
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
fDate :
6/1/2004 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830677
