Electrical behavior modeling of multimodule IES generator using a circuit analysis code PSPICE

In this presentation, we analyse the electrical behavior of multimodule inductive energy storage generators driving PRS load using a circuit analysis code PSPICE. This work is applied to the optimization of a scaled multimodule IES generator called MAG2 (6 modules, stored energy 160 kJ, Z-pinch peak current 2 MA). The first part is devoted to analog behavior modeling of the different components of these specific pulsed power generators: very fast Marx, plasma opening switches (POS), magnetic insulation transmission lines and dynamic imploding load. We carried out these studies using experimental data coming from available IES generators experiments (MAG1, GIT4). Using analog behavioral components described above, we present a time simulation of the MAG2 electrical behavior to analyse the main characteristics and critical values of this generator: overvoltages due to POS opening and load implosion, liner radius time history, load current, efficiencies evaluations. Some examples are given to show the high capabilities of these simulations for IES generator optimization: multimodule Marx and POS synchronization and evaluation of PRS load models.