Author :
Mito, T. ; Takahata, K. ; Heller, R. ; Iwamoto, A. ; Maekawa, R. ; Tamura, H. ; Yamada, Y. ; Tachikawa, K. ; Maehata, K. ; Ishibashi, K. ; Friesinger, G. ; Tasca, M. ; Nishimura, A. ; Yamada, S. ; Imagawa, S. ; Yanagi, N. ; Chikaraishi, H. ; Hamaguchi, S.
Abstract :
The National Institute for Fusion Science (NIFS), in collaboration with universities and laboratories in Japan, the Forschungszentrum Karlsruhe (FZK) and the Max-Planck Institut fur Plasma Physik (IPP) in Germany, is planning to develop high temperature superconducting (HTS) current feeders for large-scale superconducting coils. Two programs are being progressed: one is a current feedthrough for superfluid helium (He II) cooled superconducting coils; the other is current leads for experimental fusion system. The paper describes the present status of the two programs, including joint experiments of a 20 kA Bi-2223 current lead developed by FZK and development of a prototype YBCO bulk current feedthrough for He II cooled superconducting coils. In addition, the test results of Bi-2212 tubes fabricated by diffusion process, applicable to HTS current leads, are described Bi2Sr2 CaCu2O8
Keywords :
bismuth compounds; calcium compounds; copper compounds; fusion reactors; high-temperature superconductors; strontium compounds; superconducting cables; superconducting coils; superconducting magnets; 20 kA; Bi-2223 current lead; Bi2Sr2CaCu2O8; Bi2Sr2CaCu2O8 HTSC; National Institute for Fusion Science; diffusion process; high temperature superconducting current feeders; large-scale superconducting coils; superconducting experimental fusion system; superfluid helium cooled superconducting coils; Collaboration; Educational institutions; Helium; High temperature superconductors; Laboratories; Large-scale systems; Nuclear and plasma sciences; Plasma temperature; Prototypes; Superconducting coils;
