Critical current degradation in Nb3Sn cables under transverse pressure


Kate, H.H.J. ten and Weijers, H.W. and Oort, J.M. van (1993) Critical current degradation in Nb3Sn cables under transverse pressure. IEEE Transactions on Applied Superconductivity, 3 (1, Par). pp. 1334-1337. ISSN 1051-8223

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Abstract:The critical current degradation of a few sample Rutherford-type Nb3Sn cables is investigated as a function of transverse pressure. A comparison is made between Nb3Sn strands produced by the powder-in-tube, bronze, and modified jelly roll processes. The (keystoned) Rutherford cables are charged at 11 T under transverse pressures up to 250 MPa. Large differences in critical current reduction are observed, ranging from 6 to about 60% at 200 MPa, depending on the type of Nb3Sn. It appears that about 40% of the total reduction is irreversible. Moreover, the irreversible part shows relaxation, and a partial recovery is possible by thermal cycling
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Copyright:© 1993 IEEE
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