Title :
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
fDate :
3/1/2002 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018592
