Effects of the current redistribution within Nb/sub 3/Sn compacted-strand cable on its stability

Author

Hirano, N. ; Mito, T. ; Takahata, K. ; Iwamoto, A. ; Maekawa, R. ; Yamamoto, J. ; Ikeda, B. ; Kubo, Y. ; Morita, M. ; Taguchi, O. ; Saito, R.

Author_Institution

Graduate Univ. for Adv. Studies, Gifu, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

770

Lastpage

773

Abstract

The effects of current redistribution on the stability have been studied using two kinds of Nb/sub 3/Sn compacted-strand tables with chrome coating and without any coating. The minimum quench energy (MQE) has been measured in various external magnetic field and with various transport current. The MQE of the cable with chrome coating was slightly larger than that of the cable without coating when the transport/critical current ratio, I/I/sub c/, is small. The effects of the different surface condition of the strands on the stability becomes smaller, when the transport current approaches the critical current. The normal zone propagation process of these cables were also different. The initiation of the normal zone propagation in the cable without coating was slower than that in the cable with coating.

Keywords

current distribution; niobium alloys; superconducting cables; tin alloys; Nb/sub 3/Sn; Nb/sub 3/Sn compacted-strand cable; chrome coating; critical current; current redistribution; magnetic field; minimum quench energy; normal zone propagation; stability; surface condition; transport current; Coatings; Current distribution; Large-scale systems; Niobium; Power cables; Stability; Superconducting cables; Superconducting coils; Superconductivity; Tin;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614617

Filename

614617