Comparative study of NbTi strands developed for ITER PF coils

Author

Vedernikov, G.P. ; Shikov, A.K. ; Novikov, M.S. ; Novikov, S.I. ; Potanina, L.V. ; Gubkin, I.N.

Author_Institution

Bochvar Res. Inst. of Inorg. Mater., Moscow, Russia

Volume

12

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1098

Lastpage

1101

Abstract

Last year Bochvar Institute (VNIINM) has developed and produced several NbTi strands of various layouts intended for the cables of ITER PF coils. Strand layouts distinguish by filament diameter, Cu/non-Cu ratio and Cu matrix distribution between the center and periphery of cross-section. Among them two strands contain an internal CuNi resistive barrier. The studies on critical current properties at 4.5-8 T are performed and also on electrodynamics behavior of the strands, including AC losses at varying magnetic fields up to 3 T and frequency up to 10 Hz. The experimental results are presented on hysteresis losses and time constant.

Keywords

Tokamak devices; copper compounds; electric resistance; fusion reactor design; hysteresis; niobium compounds; plasma toroidal confinement; superconducting cables; superconducting coils; 0 to 10 Hz; 3 T; 4.5 to 8 T; AC losses; CuNi; ITER PF coils; NbTi; VNIINM; critical current properties; electrodynamics behavior; filament diameter; hysteresis losses; matrix distribution; poloidal field coils; resistive barrier; strands; time constant; Cables; Coils; Critical current; Electrodynamics; Frequency; Magnetic fields; Magnetic losses; Magnetic properties; Niobium compounds; Titanium compounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2002.1018592

Filename

1018592