Three-temperature model for the dynamics of a plasma produced by exploding metal wires

An MHD model of the implosion of a dense hot plasma column is developed. Because of a better description of radiation transport, this model has a higher spatial resolution compared to the previously developed, simpler, two-temperature model. The new model is applied to calculating the load (a single metal wire or an X-pinch, in particular, a heterogeneous corona-core structure with a sharp boundary) of a nanosecond high-voltage generator. An algorithm of the type previously used to solve the problem in the two-temperature model is supplemented by the iteration procedure for calculating the quasisteady radiation under the assumption that the plasma is optically thick. (C) 2000 MAIK "Nauka/Interperiodica".