A conductor, with uncoupled 2.5 μm diameter filaments, designed for the outer cable of SSC dipole magnets

Author

Gregory, E. ; Kreilick, T.S. ; Wong, J. ; Collings, E.W. ; Marken, K.R., Jr. ; Scanlan, R.M. ; Taylor, C.E.

Author_Institution

Supercon. Inc., Shrewsbury, MA, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1926

Lastpage

1929

Abstract

A conductor with a stabilizer-to-superconductor ratio of 1.8/1 and containing 22900 2.5-μm diameter filaments at a wire diameter of 0.65 mm has been produced for the outer cable of the Superconducting Super Collider (SSC). The fabrication procedures used to make this material from a full production-size billet 305 mm in diameter are described. Metallographic, electrical, and magnetization data are presented, and these illustrate the filaments are completely uncoupled at the size used in the outer SSC cable. This work indicates the feasibility of the commercial manufacture of such a 2.5-μm-diameter filamentary material. Preliminary tests show relatively low J_c and n values. It is likely that materials with smaller spacings than those used here will be required before the J_c values specified for the SSC can be obtained reproducibly

Keywords

composite superconductors; copper; critical currents; magnetisation; niobium alloys; storage rings; superconducting magnets; synchrotrons; titanium alloys; type II superconductors; 0.65 mm; 2.5 micron; NbTi; NbTi-Cu; SSC dipole magnets; Superconducting Super Collider; critical currents; diameter; electrical data; magnetization; metallographic data; outer cable; production-size billet; stabilizer-to-superconductor ratio; Billets; Communication cables; Conducting materials; Conductors; Fabrication; Magnetic materials; Magnetization; Superconducting cables; Superconducting filaments and wires; Superconducting materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92683

Filename

92683