Fine filament NbTi conductors for the SSC

Author

Kanithi, H.C. ; King, C.G. ; Zeitlin, B.A. ; Scanlan, R.M.

Author_Institution

IGC/Adv. Supercond. Inc., Waterbury, CT, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1922

Lastpage

1925

Abstract

Inner and outer grades of wire have been processed with NbTi filament diameters of 5 to 9 μm, depending on the magnet design requirements. An increase in billet diameter from 10-in to 12-in resulted in an improved critical current density approaching 3000 A/mm ² at 5 T. The authors report on the electrical properties ( J_c and n value) and mechanical properties (tensile, springback, and bend characteristics) of the strand. Piece length distributions obtained for various production billets are presented. The performance of cables fabricated from the strand is discussed. Specifically, the critical current degradation due to cabling and residual twist in the cable are addressed

Keywords

bending; composite superconductors; critical current density (superconductivity); critical currents; niobium alloys; storage rings; superconducting magnets; synchrotrons; tensile strength; titanium alloys; type II superconductors; 5 T; 5 to 9 micron; NbTi fine filament conductors; bend characteristics; billet diameter; cables; cabling; critical current degradation; critical current density; electrical properties; filament diameters; magnet design; mechanical properties; piece length distribution; residual twist; springback characteristics; superconducting super collider; tensile characteristics; Billets; Cables; Conductors; Critical current; Critical current density; Mechanical factors; Niobium compounds; Production; Titanium compounds; Wire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92682

Filename

92682