Title :
Development and investigation of multifilamentary Nb3Sn conductors to be used in the ITER magnetic system
Author :
Nikulin, A. ; Shikov, A. ; Silaev, A. ; Vorobjova, A. ; Pantsyrny, V. ; Davydov, I. ; Belyakov, N. ; Mareev, K. ; Trokhachev, G. ; Filatov, O.
Author_Institution :
Bochvar (A.A.) All-Union Sci. Res. Inst. of Inorg. Mate, Moscow, Russia
fDate :
7/1/1994 12:00:00 AM
Abstract :
Problems of manufacturing wires for the ITER magnetic system are considered. Results for Nb3Sn wires 0.80-0.85 mm in dia. manufactured using bronze technology under commercial conditions are given. Wires containing up to 45,000 filaments with volume fractions of copper stabilizer up to 56%, chromium coatings 2 mm thick and having critical current densities (non-Cu) up to 650 A/mm2 (12T, 4.2K) are discussed. Wires with extended tin sources and volume fractions of copper stabilizer equal to 60% are investigated. Jc (non-Cu) for such wires 0.85 mm in dia. reaches 1000 A/mm2 (12T, 4.2K) with hysteresis losses <550 mJ/cm3
Keywords :
critical current density (superconductivity); fusion reactor materials; fusion reactor theory and design; magnetic hysteresis; niobium alloys; superconducting magnets; superconducting materials; tin alloys; 0.80 to 0.85 mm; 12 T; 4.2 K; Cr; Cr coatings; ITER magnetic system; Nb3Sn; Nb3Sn wires; bronze technology; critical current densities; fusion reactor; hysteresis losses; multifilamentary Nb3Sn conductors; volume fractions; wires manufacture; Conductors; Critical current; Current measurement; Doping; Magnetic field measurement; Magnetic hysteresis; Niobium; Tin; Titanium; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
