Title :
Development of high current vapor-cooled current leads for large superconductor critical current measuring
Author :
Mito, T. ; Takahata, K. ; Yanagi, N. ; Yamada, S. ; Yamamoto, J. ; Uede, T. ; Sakaki, K. ; Itoh, I. ; Yasukawa, Y. ; Ueda, K.
Author_Institution :
Nat. Inst. for Fusion Sci., Nagoya, Japan
fDate :
1/1/1992 12:00:00 AM
Abstract :
Several programs to develop superconducting magnets for the Large Helical Device (LHD) are under way at the National Institute for Fusion Science in Japan. The development of large-scale superconductors for use in superconducting magnets is an important goal of these programs. To measure the critical current of such large-scale superconductors it is necessary to supply a very high current of up to 100 kA. For this purpose, very large current capacity, vapor-cooled current leads have been developed. As a first step in this development, a pair of current leads with a short-time rated current of 30 kA has been made and tested. Also developed was an analytical program to calculate the time-dependent characteristics of vapor-cooled current leads, and the results of calculations with the experimental results obtained with 30 kA current leads were compared
Keywords :
critical currents; electric current measurement; fusion reactor theory and design; power cables; superconducting magnets; 100 kA; 30 kA; 75 kA; Large Helical Device; critical current measurement; high current vapor-cooled current leads; large-scale superconductors; short-time rated current; superconducting magnets; superconductor critical current; time-dependent characteristics; Critical current; Current measurement; Large-scale systems; Power supplies; Steady-state; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Testing; Transient analysis;
Journal_Title :
Magnetics, IEEE Transactions on
