Title :
Numerical analysis of stability and quench characteristics of superconductors for the LHD coils
Author :
Fujiwara, T. ; Ohnishi, T. ; Mito, T. ; Matsukawa, M. ; Noto, K. ; Sugita, K. ; Yamamoto, J.
Author_Institution :
Fac. of Eng., Iwate Univ., Morioka, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
A numerical analysis has been performed on the stability and quench characteristics of superconductors for helical coils of the Large Helical Device. Two types of conductors are dealt with, both of which consist of a NbTi/Cu superconducting cable stabilized by pure aluminium. The analysis is based on a two-dimensional model and the heat conduction equation was solved numerically. The distributions of temperature and current density are clarified for the cases of recovery and quench. The minimum input energies required to initiate a quench are calculated and compared with the experimental values.<>
Keywords :
copper; critical current density (superconductivity); fusion reactor theory and design; heat conduction; niobium alloys; numerical analysis; quenching (thermal); superconducting magnets; titanium alloys; Al; LHD coils; Large Helical Device; NbTi-Cu superconducting cable; current density; fusion device; heat conduction equation; helical coils; minimum input energies; numerical analysis; quench characteristics; stability; superconductors; temperature distribution; two-dimensional model; Aluminum; Conductors; Niobium compounds; Numerical analysis; Numerical stability; Stability analysis; Superconducting cables; Superconducting coils; Superconducting devices; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
