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Multimodule disk explosive magnetic generators (DEMGs) of microsecond pulses of electromagnetic energy up to hundreds of megajoules, based on the internal explosive energy into electromagnetic energy conversion (magnetic flux compression), are reviewed. Fundamentals of the DEMG operation are outlined. Conventional DEMGs with intricate disk profile are described in short. A numerical technique of DEMG simulations is outlined. Special attention is given to the modernized DEMGs with flat modules of different calibers. At preservation of the output characteristics of the DEMGs with profile discs, the factor of the explosive to electromagnetic energy conversion of the DEMGs with flat discs is twofold higher; such DEMGs achieve higher speeds, represent a technological advance and are less expensive. [ABSTRACT FROM AUTHOR]

Matching devices in the form of electro-exploded current opening switches (EEOSs) or explosive current opening switches (EOSs) are used for transforming current pulses of magnetocumulative generators (MCGs) into voltage pulses of hundreds of kilovolts at high-impedance loads. Current pulse sharpening is accompanied by significant losses of the stored energy. Using EOSs are more preferable to EEOSs from the point of view of the energy losses since it does not lead to efficiency decrease in the MCG operation. This paper considers magnetocumulative multimodule systems consisting of several synchronously operating and serially connected small helical MCGs. Each generator is equipped with an explosive current opening switch. The voltages generated at each opening switch are summarized into the load. Fast operation of MCGs allows using very thin foils in the opening switches and obtaining the short voltage pulse front. Results of the works on creating high-voltage devices based on helical MCGs of a 60-mm diameter and disk EOSs of a 200-mm diameter are presented in this paper. In the experiment, the device consisting of two modules provides a voltage pulse of 370 kV with a rise time of $\sim 170$ ns into a load of 29 $\Omega $ and an inductance of 0.5 $\mu $ H. Maximum power in the load is $\sim 4.3$ GW, and the emitted energy is $\sim 1.1$ kJ. The four-module device forms the pulse with the characteristic current rise time of $\sim 100$ ns in the similar load at twice smaller current. [ABSTRACT FROM PUBLISHER]

The first test of a pulsed power system consisting of a five-element disk magneto-cumulative generator with high-explosive charges of 240 mm diameter and an explosive current opening switch with ribbed barrier was carried out in the frameworks of a program for creating an explosive complex EMIR, intended for the generation of high-power soft X-ray radiation pulses. A current pulse of ∼9 MA with a characteristic rise time of ∼0.6 μs was recorded at opening of the generator circuit with the current of ∼15 MA into a ∼7 nH inductance load. [ABSTRACT FROM AUTHOR]