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Pulsed field losses and coupling current loop in a large‐current superconductor
Author(s) -
Shimamoto Susumu,
Murase Satoru,
Nishii Kenji,
Naitou Fuminobu,
Matsui Kunihiro,
Takahashi Yoshikazu,
Tsuji Hiroshi
Publication year - 2003
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10088
Subject(s) - conductor , superconductivity , current (fluid) , conductance , materials science , coupling (piping) , loop (graph theory) , superconducting magnet , magnet , time constant , electrical engineering , condensed matter physics , physics , engineering , composite material , mathematics , combinatorics
Pulsed field losses in a short sample (445 mm length) of 46‐kA Nb 3 Sn cable‐in‐conduit conductor of superconducting magnet for the fusion experimental reactor “ITER” are measured by a calorimetric method. The coupling time constant between strands is obtained as 30 ms through pulsed loss. Based on this time constant and interstrand conductance measurement, it is expected that there is a coupling current loop length of about 400 mm, which is longer than half the fabrication twist pitch in the fourth cabling stage. A geometrical calculation on several‐stage cabling shows this value to be reasonable. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 142(4): 27–33, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10088