Title :
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
fDate :
6/1/1995 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
