Dynamic model of FN II plasma focus

Summary form only given, as follows. A simple physical model has been devised for the plasma focus, based on the snow-plow equation. This is an energy-balanced model which provides the correct end-point for the implosion trajectory, thus giving the correct quasi-equilibrium radius. The snow-plow model however is essentially structureless. Potter (1978) suggested a slug model which he applied to the specific case of constant current and constant length pinch to obtain a collapsing layer with structure. We extend this slug model to the radial compression phase of the plasma focus, allowing the length of the pinching column and the plasma current to vary self-consistently.