TY - JOUR
T1 - Joint resistance characteristics of mechanical lap joint of a GdBCO tape with a change in temperature and magnetic field
AU - Seino, Yutaro
AU - Ito, Satoshi
AU - Hashizume, Hidetoshi
N1 - Funding Information:
This work was supported in part by MEXT, Grant-in-Aid for Young Scientists (A), 23686132, 2012.
Publisher Copyright:
© 2013 IEEE.
PY - 2014
Y1 - 2014
N2 - Mechanical joints of a high-temperature superconducting (HTS) conductor has been investigated for a "remountable" (demountable) HTS magnet. In a previous study, prediction method of joint resistance for a large-scale conductor was proposed using experimental data and current distribution analysis. However, the data were obtained by tests conducted at 77 K under self field. The joint resistance consists of contact resistance and resistance of constituted materials of HTS tapes, which depend on temperature and magnetic field. In this paper, therefore, we experimentally and numerically evaluated joint resistance characteristics with changing temperature and magnetic field using mechanical lap joint of a GdBCO tape. The experimentally evaluated joint resistance varied with the temperature and magnetic field as predicted. The joint resistance characteristic also depended on contact materials. The numerically evaluated contact resistance included in the joint resistance depending on temperature shows a tendency similar to the calculated value of the constriction resistance based on the Holm's contact theory.
AB - Mechanical joints of a high-temperature superconducting (HTS) conductor has been investigated for a "remountable" (demountable) HTS magnet. In a previous study, prediction method of joint resistance for a large-scale conductor was proposed using experimental data and current distribution analysis. However, the data were obtained by tests conducted at 77 K under self field. The joint resistance consists of contact resistance and resistance of constituted materials of HTS tapes, which depend on temperature and magnetic field. In this paper, therefore, we experimentally and numerically evaluated joint resistance characteristics with changing temperature and magnetic field using mechanical lap joint of a GdBCO tape. The experimentally evaluated joint resistance varied with the temperature and magnetic field as predicted. The joint resistance characteristic also depended on contact materials. The numerically evaluated contact resistance included in the joint resistance depending on temperature shows a tendency similar to the calculated value of the constriction resistance based on the Holm's contact theory.
KW - Fusion reactors
KW - High-temperature superconductors (HTSs)
KW - Power cable connecting
KW - Superconducting magnets
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U2 - 10.1109/TASC.2013.2289356
DO - 10.1109/TASC.2013.2289356
M3 - Article
AN - SCOPUS:84991000792
SN - 1051-8223
VL - 24
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 6657705
ER -