Multi-module system for fast-rising high-voltage pulse formation

Matching devices in the form of electro-exploded (EEOS) or explosive (EOS) opening switches are used for transforming current pulses of magneto-cumulative generators (MCG) into voltage pulses of hundreds kilovolts at high-impedance loads. Current pulse sharpening is accompanied by significant losses of the stored energy. Using EOS is more preferable compared to EEOS from the point of view of the energy losses since it does not lead to efficiency decrease of the MCG operation. The paper considers magneto-cumulative multi-module systems (MCMS) consisting of several synchronously operating and serially connecting small helical MCG generators. Each generator equipped with the explosive current opening switch. Voltages, generated at each opening switch, are summarized into the load. Fast operation of the MCG allows using very thin foils in the opening switches, and obtaining short voltage pulse front. Results of the works on creating high-voltage devices based on helical MCG of 60 mm diameter and disk EOS of 200 mm diameter are presented in the paper. In the experiment the device consisting of two modules provides the voltage pulse of 370 kV with the rise time of ~100 ns into the load of 27 Ω and inductance of 0.5 μH.