Simulation of different regimes of plasma dynamics in opening switch

Within the framework of the equations of two-dimensional two-fluid magnetohydrodynamics (MHD), numerical code has been developed for modeling plasma dynamics in axially-symmetric plasma configurations, such as plasma opening switches (POS), Z-pinch, etc., especially in the case when the role of two-fluid MHD-effects is dominant, This code is applied here to determine the dependence of the conduction time of POS on plasma density and chemical composition as well as the parameters of the external electrical circuit. An explosion mechanism, taking into account anomalous resistance of POS plasma, is examined here. Different regimes of plasma dynamics in POS have been analyzed. The results of this work can be directly used for optimization of POS experiments.