Double-layer Sleeve Z-pinch Implosion Numerical Simulation Study

Properties of high-energy density plasma play a great role in physics ^specially in Weapon Physics research. In laboratory to obtain several keV and tens of Mbar plasma, Z pinch is proved to be of expectancy. However, the increase of instability makes great troubles for researchers. Complex instabilities destroy the simplicity and homogenous of the plasma, therefore decrease the efficiency of the energy transfer. Composite pinch of double liners, a particular variation of the Z pinch in which a successive transfer of current within the plasma structure is used to provide considerably better control of the pinch radiative properties, has made great progress in restraining the growth of instability.In this paper we have performed one-dimension numerical studies on electro-magnetically driven double-liner implosion system. MHD equations and splitting method have been used. To avoid time step limitation resulting from the Courant conditions, experience indicates the desirability of using implicit methods.In this article we have calculated two kind of material(Al&Wu) models. We have discussed the changes of temperature, density and pressure of the inner liner after collision. Also current distribution between the two liner is reported. Numerical realization of the composite pinch of double liners and POW (Plasma On Wire) schemes confirms the main conclusions of the models and demonstrates sharpening radiation pulse power and higher dl/dt on the inner liner.