Compressive Strain and Critical Current Properties of Nb[sub 3]Sn Conductors Reinforced by Center-Arranged and Distributed Ta.

Autor: Takao, Tomoaki, Takahashi, Yutaka, Ito, Toru, Yamaguchi, Masakatsu, Umekawa, Kenji, Kondo, Junji, Umeda, Masaichi
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Zdroj: IEEE Transactions on Applied Superconductivity; Jun2003 Part 3 of 3, Vol. 13 Issue 2, p3382, 4p, 2 Black and White Photographs, 1 Diagram, 2 Charts, 6 Graphs
Abstrakt: We have fabricated two kinds of Nb[sub 3]Sn 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 (I[sub c]) of the distributed Ta conductor was larger than that of the center-gathered Ta conductor. However, an I[sub c] of the distributed-Ta type conductor rapidly decreased, and when the compressive strain became approximately 5 or 6%, the I[sub c] 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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index