Title :
Stability characteristics of a cable-in-conduit conductor by subcooled supercritical helium
Author :
Wachi, Y. ; Hanawa, S. ; Ono, M. ; Shimada, M. ; Hamajima, T. ; Takano, H. ; Shinohara, H. ; Takahata, K. ; Yamamoto, J. ; Motojima, O.
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
7/1/1994 12:00:00 AM
Abstract :
The stability and limiting current of a NbTi forced-cooled superconducting coil have been investigated experimentally and analytically at the subcooled condition below 4.5 K. The test coil was wound in a one layer solenoid from a cable-in-conduit type conductor of critical current of 5.1 kA at 4.2 K and 6.5 T, whose total length was 10 m. It was installed in the bore of a back-up superconducting magnet that provided field 8 T at the test coil. The stability margin of the coil as a function of normalized current (transport current/critical current) were measured. The results are compared with the formula proposed by Dresner and reported to predictions of stability margin and limiting current at subcooled condition below 4.5 K
Keywords :
critical currents; niobium alloys; superconducting magnets; titanium alloys; type II superconductors; 10 m; 4.5 K; 5.1 kA; NbTi; NbTi forced-cooled superconducting coil; cable-in-conduit conductor; critical current; limiting current; normalized current; stability; subcooled supercritical He; transport current/critical current; Conductors; Critical current; Niobium compounds; Solenoids; Stability analysis; Superconducting cables; Superconducting coils; Testing; Titanium compounds; Wounds;
Journal_Title :
Magnetics, IEEE Transactions on
