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

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

960

Lastpage

963

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.120039

Filename

120039