Title :
Experimental results of the Nb3Sn demo poloidal coil (DPC-EX)
Author :
Ando, T. ; Okuno, K. ; Nakajima, H. ; Yoshida, K. ; Hiyama, T. ; Tsuji, H. ; Takahashi, Y. ; Nishi, M. ; Tada, E. ; Koizumi, K. ; Kato, T. ; Sugimoto, M. ; Isono, Takaaki ; Kawano, K. ; Konno, M. ; Yoshida, J. ; Ishida, H. ; Kawagoe, E. ; Kamiyauchi, Y. ;
Author_Institution :
Japan Atomic Res. Inst., Ibaraki, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
In order to demonstrate the applicability of a Nb3Sn conductor to pulsed poloidal coils for Tokamak fusion machines, the Nb 3Sn Demo Poloidal Coil (DPC-EX) has been fabricated and tested. DPC-EX, whose inner diameter is 1 m, consists of two double pancakes made by a react-and-wind technique. The coil has a flat cable-in-conduit conductor cooled by forced-flow helium. DPC-EX has been set up in the Demo Poloidal Coil Test Facility (DPCF). In the operation of the coils in series, DPC-EX has been ramped up to 17 kA in 1 s. The magnetic field at this point was 6.7 T, and pulsed operation at 6.7 T/s was thus demonstrated. An average current density of 37.2 A/mm2 in the winding was achieved in this operation, and the AC loss of the coil was confirmed to be quite small
Keywords :
Tokamak devices; composite superconductors; fusion reactor theory and design; niobium alloys; superconducting magnets; tin alloys; type II superconductors; 6.7 T; A15 superconductor; AC loss; Demo Poloidal Coil Test Facility; Nb3Sn demo poloidal coil; Tokamak fusion machines; average current density; double pancakes; flat cable-in-conduit conductor; pulsed poloidal coils; react-and-wind technique; superconducting coils; Coils; Conductors; Current density; Helium; Magnetic fields; Niobium; Test facilities; Testing; Tin; Tokamaks;
Journal_Title :
Magnetics, IEEE Transactions on
