Critical current degradation in Nb3Sn cables under transverse pressure

H.H.J. ten Kate; H.W. Weijers; J.M. van Oort

doi:10.1109/77.233653

Critical current degradation in Nb3Sn cables under transverse pressure

H.H.J. ten Kate, H.W. Weijers, J.M. van Oort

Faculty of Science and Technology

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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

Original language	English
Pages (from-to)	1334-1337
Number of pages	4
Journal	IEEE transactions on applied superconductivity
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/77.233653
Publication status	Published - 1993

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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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AB - 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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Critical current degradation in Nb3Sn cables under transverse pressure

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