Development of Nb/sub 3/Al multifilamentary superconductors

Author

Ayai, N. ; Yamada, Y. ; Mikumo, A. ; Takahashi, K. ; Sato, K. ; Koizumi, N. ; Sugimoto, M. ; Ando, T. ; Takahashi, Y. ; Nishi, M. ; Tsuji, H.

Author_Institution

Sumitomo Electr. Ind. Ltd., Japan

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

893

Lastpage

896

Abstract

Nb/sub 3/Al/Cu multifilamentary strands fabricated by the Jelly-roll process, and cable-in-conduit conductors have been developed for fusion magnets. The recent strand has achieved a high critical density of 800 A/mm/sup 2/ (12 T, 4.2 K) with a feasible heat treatment condition for large coils or conductors. The improved strands have were also confirmed to good bending and tensile strain tolerance. A cable-in-conduit Nb/sub 3/Al superconductor with 1152 strands was also developed. It has a titanium conduit and center tube, conforming to the current design for ITER magnets.<>

Keywords

aluminium alloys; copper; critical current density (superconductivity); electric conduits; heat treatment; multifilamentary superconductors; niobium alloys; power cables; superconducting cables; superconducting coils; superconducting magnets; 12 T; 4.2 K; ITER magnets; Jelly-roll process; Nb/sub 3/Al-Cu; bending; cable-in-conduit conductors; coils; critical density; design; development; fabrication; fusion magnets; heat treatment; multifilamentary superconductors; tensile strain tolerance; Conductors; Critical current density; Magnetic field induced strain; Multifilamentary superconductors; Niobium; Superconducting cables; Superconducting coils; Superconducting magnets; Toroidal magnetic fields; Wire;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402692

Filename

402692