Title :
Development of forced-cooled superconducting coil for Large Helical Device
Author :
Wachi, Y. ; Shimada, M. ; Nakamoto, K. ; Shibui, M. ; Hamajima, T. ; Ioka, S. ; Motojima, O. ; Yamamoto, J. ; Takeo, M. ; Mito, T. ; Takahata, K.
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
A force-cooled superconducting coil has been studied for the Large Helical Device (LHD), which will be a main experimental apparatus of the Japanese National Institute for Fusion Science (NIFS). To achieve the main requirements for the LHD, a large-current, high-current-density NbTi cable-in-conduit-type conductor of 10 kA and 47 A/mm2 at 8 T was developed. The test coil was wound in the form of a one-layer solenoid and tested at an operating current of 10 kA in a superposed field of about 7 T, at a hydraulic condition of 1.0 MPa, 4.5 K, and 10 g/s supercritical helium. The stability, normal propagation velocity, and pressure rise during a quench for the high-current-density case were also studied
Keywords :
cooling; fusion reactor theory and design; solenoids; stability; superconducting magnets; 1 MPa; 10 kA; 4.5 K; 7 to 8 T; LHD; Large Helical Device; NbTi; cable-in-conduit-type conductor; experimental apparatus; forced-cooled; high-current-density case; hydraulic condition; normal propagation velocity; one-layer solenoid; pressure rise; quench; stability; superconducting coil; supercritical He; Conductors; Helium; Niobium compounds; Solenoids; Stability; Superconducting cables; Superconducting coils; Testing; Titanium compounds; Wounds;
Journal_Title :
Magnetics, IEEE Transactions on
