Title :
Study of Nb3Sn strand with enhanced characteristics for ITER
Author :
Vorobieva, A. ; Shikov, A. ; Silaev, A. ; Dergunova, E. ; Lomaev, V. ; Nasibulin, M. ; Mareev, K. ; Kuznetsov, S.
Author_Institution :
Bochvar (A.A.) All-Union Sci. Res. Inst. of Inorg. Mater., Moscow, Russia
fDate :
3/1/2001 12:00:00 AM
Abstract :
The results of the study of perspective Nb3Sn strands of new layout, which can be used for ITER-FEAT magnetic system, are presented. A new approach allowed to provide more uniform distribution of superconducting filaments in the strand cross-section. These strands, made by the bronze route, contain 7600 filaments artificially doped with titanium. The external Cu stabilizer is separated from the bronze/filament matrix by a Ta/Nb diffusion barrier. The properties of the superconductor meet the new ITER specifications. The critical current density of the strands (0.7-0.8 mm in diameter) at 12 T and 4.2 K, is above 700 A/mm2, while the hysteresis loss is lower than 190 mJ/cm3 at ±3 T
Keywords :
critical current density (superconductivity); hysteresis; losses; multifilamentary superconductors; niobium alloys; superconducting coils; tin alloys; type II superconductors; (NbTi)3Sn; Cu; ITER-FEAT magnetic system; Nb; Nb3Sn; Nb3Sn strand; Ta; Ta/Nb diffusion barrier; bronze route; critical current density; enhanced characteristics; external Cu stabilizer; hysteresis loss; strand cross-section; superconducting filaments; Assembly; Critical current density; Magnetic hysteresis; Magnetic separation; Niobium; Niobium-tin; Superconducting filaments and wires; Superconducting magnets; Superconducting materials; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
