Title :
Stability of cable-in-conduit superconductors for Large Helical Device
Author :
Takahata, K. ; Mito, T. ; Satow, T. ; Yanagi, N. ; Sakamoto, M. ; Yamada, S. ; Nishimura, A. ; Yamamoto, J. ; Motojima, O. ; Mizumaki, S. ; Nakamoto, K. ; Uchida, T. ; Wachi, Y. ; Shimada, M. ; Itoh, S. ; Ioka, S.
Author_Institution :
Nat.Inst. for Fusion Sci., Nagoya, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
The stability of cable-in-conduit superconductors has been experimentally investigated as part of a poloidal field coil program for the Large Helical Device (LHD) project. A new conductor was designed and fabricated, focusing on the stability. As a result of a zero-dimensional stability analysis, it was found that the conductor had a high stability, 5*10/sup 5/ J/m/sup 3/, at the design condition of 20.8 kA and 6.5 T. Current transfer performance after partial quenching has been investigated by using a short sample of the conductor for the poloidal field coil. The effects of the current transfer among the strands on the conductor stability are discussed.<>
Keywords :
critical currents; fusion reactor theory and design; niobium alloys; quenching (thermal); superconducting cables; superconducting magnets; titanium alloys; 20.8 kA; 6.5 T; LHD; Large Helical Device; NbTi-Cu; cable-in-conduit superconductor stability; critical current; current transfer; fusion reactor; partial quenching; poloidal field coil; zero-dimensional stability analysis; Coils; Conducting materials; Conductors; Current distribution; Insulation; Power cables; Stability analysis; Superconducting cables; Superconducting devices; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
