Title :
Development of Nb/sub 3/Al cable-in-conduit fusion superconductors
Author :
Ando, T. ; Takahashi, Y. ; Sugimoto, M. ; Nishi, M. ; Tsuji, H. ; Yamada, Y. ; Nagata, M.
Author_Institution :
JAERI, Ibaraki, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
The present status of Nb/sub 3/Al cable-in-conduit conductor development is described. Nb/sub 3/Al cable-in-conduit conductors have been developed for application to the International Thermonuclear Experimental Reactor (ITER) magnet. Several conductors were fabricated having a full size and a sub-size with current capacity of 5-40 kA at 11.2 T. Their performance was examined by critical current and mechanical property tests. The full-size 40 kA-11.2 T conductor consisted of 324 Nb/sub 3/Al strands inserted in a CuNi conduit. The Nb/sub 3/Al strands were made by the Jelly Roll process and had a diameter of 1.22 mm and a copper ratio of 2. The non-copper current density was over 600 A/mm/sup 2/ at 11.2 T and 4.2 K. The effective filament diameter was less than 20 mu m.<>
Keywords :
Tokamak devices; aluminium alloys; critical current density (superconductivity); fusion reactor theory and design; niobium alloys; superconducting cables; superconducting magnets; 1.22 mm; 11.2 T; 4.2 K; 5 to 40 kA; CuNi conduit; ITER superconducting magnet; International Thermonuclear Experimental Reactor; Jelly Roll process; Nb/sub 3/Al strands; cable-in-conduit fusion superconductors; critical current; current capacity; effective filament diameter; mechanical property; tokamak fusion reactor; transverse stress effect; Aluminum; Conductors; Copper; Critical current density; Heat treatment; Magnetic field measurement; Magnetic hysteresis; Niobium; Superconducting cables; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
