Prediction of quench characteristics in multi-sectioned adiabatic solenoids

A computer program that simulates quenches in superconducting multisectioned solenoids is described. The winding of each section is assumed to be a close-packed hexagonal arrangement of wire impregnated with epoxy resin. The program predicts the current, terminal voltages, and temperature distribution for each section of the coil. The normal zone is assumed to originate at the high-field region of the winding and to grow radially and axially by heat conduction through the insulation and epoxy. Azimuthal propagation being very rapid is assumed to be instantaneous. Transverse propagation is calculated from an empirical correlation based on measurements in small samples of conductor configured to simulate coil windings. The model is used to predict the current and terminal voltages in two- and four-section solenoids. The results show good agreement between the predictions and quenching experiments.