Critical current degradation in Nb/sub 3/Sn cables under transverse pressure

Author

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

Author_Institution

Appl. Superconductivity Center, Twente Univ., Enschede, Netherlands

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1334

Lastpage

1337

Abstract

The critical current degradation of a few sample Rutherford-type Nb/sub 3/Sn cables is investigated as a function of transverse pressure. A comparison is made between Nb/sub 3/Sn 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 Nb/sub 3/Sn. 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.<>

Keywords

critical current density (superconductivity); niobium alloys; tin alloys; type II superconductors; 250 MPa; Nb/sub 3/Sn cables; Rutherford cables; critical current reduction; partial recovery; relaxation; thermal cycling; transverse pressure; Critical current; Current supplies; Degradation; Magnetic materials; Niobium; Niobium-tin; Stress; Superconducting cables; Superconducting magnets; Tin;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233653

Filename

233653