The results of studies of a solid-state closing switch for a high-current pulse switching are presented. The experiments were carried out on a laboratory facility with a capacitive energy storage run down a discharge circuit with electrical-explosive opening switch (EEOS) by a current pulse with an amplitude 450 kA. The discharge circuit consists of two sections separated by a branch with a solid-state closing switch. A metal foil of the EEOS can be located in an interelectrode gap of the closing switch. The operation of the EEOS leads to a breakdown of the insulation of the closing switch, as a result of which an effective shunting of the section of the discharge circuit containing the EEOS occurs. The developed combined solid-state closing switch in the future is capable of providing multi-channel switching of a high-current pulse to the load synchronously with the EEOS operation.

The collective acceleration of xenon ions in a plasma-anode vircator is studied. It is shown that the energy of accelerated ions may reach 900 MeV. The image of a bremsstrahlung source on the target suggests effective transport of relativistic electrons in the drift channel.

Summary form given only. Results of an experiment, performed for the first time, on realization of a plasma current channel (PCC) opening in a plasma current opening switch (POS), powered from a current magneto-cumulative generator (MCG) are presented in the paper. To study the POS operation as an energy source we used the helical MCG having an internal stator diameter of 200 mm (MCG-200). The generator MCG-200 with the explosive current opening switch makes it possible to realize the current pulse with an amplitude I max ~4 MA with a rise time of ~1 mus in a load up to 50 nH inductance. In the experiment we installed three gas-plasma injectors with a pulsed gas puff on the outer cylindrical electrode of a plasma chamber. These devices inject plasma jets of 4 cm diameter with an electrons density up to 10 10 cm 3 on the injector output into a radial inter-electrode gap of the POS. We used integrated Rogovsky coils to record a value and pulses shape of the current, and differentiating probes to measure a current derivative. In the experiment we used more than 40 recording channels based on analogue and digital oscilloscopes. Analysis of the experimental data showed that all methods agree with each other with the precision of the measurements errors. Critical current of the POS was 1.9plusmn0.1 MA, the current decay time at the breaking moment reaches the value of ~10 13 A/s.

Plasma current channel breakage has been realized in experiments with a plasma opening switch (POS) driven by a magnetic explosion generator. The POS critical current was 1.9 ± 0.1 MA and the current fall rate reached ∼10 13 A/s.

The results of experiments with irradiated permalloy-79 foils show that a necessary condition for a change in the alloy microhardness to take place on the rear (unirradiated) side of the foil is the presence of a natural oxide film on the exposed side of the sample. It is established that the observed phenomenon is not related to heating of the samples and the magnitude of the effect depends in a nonmonotonic manner on the irradiation dose. A possible mechanism of this phenomenon is discussed.