Author :
Tsuji, Hiroyuki ; Okuno, H. Tsuji K ; Nakajima, H. ; Ando, T. ; Takahashi, Y. ; Nishi, M. ; Yoshida, Kenta ; Tada, E. ; Koizumi, K. ; Kato, T. ; Isono, T. ; Oshikiri, M. ; Hiyama, T. ; Kawano, K. ; Yamamura, H. ; Sato, M. ; Yoshida, J. ; Itoh, N. ; Shimam
Abstract :
The fabrication of two 30-kA NbTi pulsed coils and one 10-kA Nb/sub 3/Sn coil with a total stored energy of 40 MJ is in progress as a part of the DPC (Demonstration Poloidal Coil) Program. All the Nb-Ti superconducting strands have been fabricated, and their loss time-constant has been measured at 0.32 ms at 7 T, which is well below the initial target of less than 1 ms. A novel winding technique is described for the large current conductor which provides good mechanical contact.<>
Keywords :
niobium alloys; superconducting magnets; 0.32 ms; 30 kA; 40 MJ; Nb/sub 3/Sn; NbTi; current conductor; demo poloidal coil program; loss time-constant; mechanical contact; pulsed coils; superconducting strands; winding; Conductors; Current measurement; Fabrication; Force measurement; Insulation; Loss measurement; Niobium compounds; Pulse measurements; Superconducting coils; Time measurement;
