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Compressive strain and critical current properties of Nb3Sn conductors reinforced by center-arranged and distributed Ta

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7 Author(s)
Takao, T. ; Dept. of Electr. & Electron. Eng., Sophia Univ., Tokyo, Japan ; Takahashi, Y. ; Ito, T. ; Yamaguchi, M.
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We have fabricated two kinds of Nb3Sn superconductors having the same diameter; one superconductor is reinforced by center-gathered tantalum (Ta) in a cross-section of the conductor, and the other is reinforced by distributed Ta in the cross-section. We applied compressive force to the conductors, and measured degradation of the conductors. When the conductor's strain due to the compressive force to the conductors was zero, a critical current (Ic) of the distributed Ta conductor was larger than that of the center-gathered Ta conductor. However, an Ic of the distributed-Ta type conductor rapidly decreased, and when the compressive strain became approximately 5 or 6%, the Ic of the center-gathered Ta conductor exceeded that of the distributed-Ta type. It was experimentally shown that the center-gathered Ta conductor was more tolerant than the distributed Ta conductor about the compressive strain to the conductor.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:13 ,  Issue: 2 )

Date of Publication:

June 2003

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