Validation Through Experiments of a 3-D Time-Dependent Model of Internal Charging

A new model of dielectric conductivities has been implemented in SPIS-IC. It allows modeling the time-dependent behavior of the charge transport and the electric potential inside payload components under realistic radiation environments in space. The simulation results have been compared to experiments on four validation cases going from simple 1-D geometry to more complex 3-D components such as a d-type connector. The comparison shows a good agreement in most of the cases, and the discrepancies are explained in certain cases. Finally, the results have been analyzed in term of discharge probability and severity. This study also shows the great importance of time-dependent modeling of the radiation-induced conductivity.