The effect of Ti conduit on the critical current in (NbTi)/sub 3/ Sn cable-in-conduit conductors

Author

Ando, T. ; Nakajima, H. ; Hiue, H. ; Wadayama, Y.

Author_Institution

JAERI, Ibaraki, Japan

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

488

Lastpage

491

Abstract

The authors investigated the effect of Ti conduit on the critical current in (NbTi)/sub 3/Sn cable-in-conduit conductors in comparison with stainless steel and copper-nickel alloy conduits. Ti has a coefficient of thermal expansion closely matching (NbTi)/sub 3/Sn and is expected to prevent the compressive thermal prestrain introduced in (NbTi)/sub 3/Sn filaments. As samples, two kinds of conductors were prepared, one consisting of seven (NbTi)/sub 3/Sn strands and the other of 36 (NbTi)/sub 3/Sn strands. The (NbTi)/sub 3/Sn strands produced by a bronze process had a diameter of 1.0 mm and a copper ratio of 2. The experimental results indicated that the critical current density in conductors with a Ti conduit and void fraction in the range of 5-46% nearly matched that of a single strand. From these results, Ti appears to be attractive as a practical conduit material for (NbTi)/sub 3/Sn cable-in-conduit conductors.<>

Keywords

critical current density (superconductivity); fusion reactor theory and design; niobium alloys; superconducting cables; superconducting magnets; tin alloys; titanium alloys; voids (solid); (NbTi)/sub 3/Sn strands; 1 mm; Ti conduit effect; bronze process; cable-in-conduit conductors; compressive thermal prestrain; critical current density; fusion reactor; poloidal coil; thermal expansion; toroidal coil; void fraction; Conducting materials; Conductors; Copper alloys; Critical current; Iron alloys; Niobium compounds; Steel; Thermal expansion; Tin; Titanium compounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233749

Filename

233749