Abstract
A new method has been developed for numerical analysis of quench transients in cable-in-conduit (CIC) forced-flow cooled superconductors. In this method, the quench transients are separated into two time-domains, for which different models are introduced. The first model includes the thermal conduction of the conductor, the heat transfer and the supercritical helium flow, but in the second model two assumptions on the thermal conduction and the heat transfer are introduced so as to omit the calculation of the thermal conduction equation of the conductor. So as to verify the validity of the present method, the present method is compared with the ordinary method, which uses only the first model over all time-domains. Results show that the solution by the present method has almost the same accuracy as that by the ordinary method and that the computing time by the former method is very shorter than that by the latter method. As an application, the influence of the thermal disturbance location on quench transients has been investigated using the present method, and it has been made clear.
