TRANSIENT ANALYSIS OF QUENCH PROPAGATION IN SUPERCONDUCTING COILS

A computer program has been developed for simulating quench propagatio n and associated transient thermal and electric behavior of supercondu cting coils. The quench propagation has been analyzed using a logical coordinate system in order to transform a three-dimensional problem in to a one-dimensional problem. In a logical coordinate system, supercon ducting coils are assumed to consist of long wires which are divided i nto elements of finite length. The capability of the present method wa s examined by analyzing the quench propagation in the solenoid coil sy stem with epoxy-bonded NbTi superconductors, and the analysis results were compared with the experimental data. The comparison indicated goo d correlation of the computed quench time with the experimental data.