Peskar' — An electron beam generator for industrial applications

The design of a electronic beam pulse generator for industrial applications is described. The parameters of the electron beam are 700 kV, 25 kA, and 1 μsec. The design features of the magnetic circuits and the test bench used to test and inspect them are described. Institute of High-Current Electronics, Siberian Division, Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 98–102, December, 1995.     

Uncontrollable multichannel commutator in the output cascade of the SNOP-3 generator

A multichannel uncontrollable submersible commutator is described. The commutator is tested in the output cascade of the SNOP-3 generator in the discharge of a signal-forming line with a wave resistance of 0.65 Ω to a transmission line with the same wave resistance and an inductive load of 30 nH. The inductance and ohmic resistance of the commutator are determined (15–20 nH and 0.2 Ω, respectively). With the inductive load of 30 nH, a rate of current increase of 3·10¹³ A/sec is obtained. A special commutator design with a screened grounded plane is tested; this design permits reduction in the prepulse voltage at the load to 0.25% of the voltage at the signal-forming line. Institute of High-Power Electronics, Siberian Branch, Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 67–72, December, 1995.     

High-voltage insulation of a high-power pulse transformer

The results of the development and operation of a high-voltage insulation are described. The insulation has been developed for the secondary turn of a high-power pulse transformer. The operating electric field in the insulation on the nanosecond scale is 1.5 MV/cm. The prospects for using this insulation are discussed. Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 15–19, December, 1999.     

Physicochemical properties and activity of nanopowder catalysts in the hydrodesulfurization of diesel fraction

New hydrofining catalysts based on molybdenum, nickel, and aluminum nitride nanopowders produced by electrical explosion are obtained. Their physicochemical properties are studied. The direct sulfurizing of molybdenum nanopowders with sulfides from straight-run diesel oil fraction is shown to be possible. The high hydrodesulfurization capability of nanopowder catalysts is established.     

Small-Size High-Current Generators for X-Ray Backlighting

Russian Physics Journal - The paper deals with the soft X-ray backlighting based on the X-pinch as a powerful tool for physical studies of fast processes. Proposed are the unique small-size pulsed...     

Formation of narrow low-energy high-intensity electron beams

The process of formation of high-density low-energy (5–10 keV) pulsed electron beams of small diameter (on the order of a few millimeters) in a gun of the “channel-spark” type is studied. It is shown that beams with a rate of rise of the current exceeding 10¹¹ A/s and an amplitude exceeding the Alfvén current by a factor of 1.5–2.0 can be obtained in experiments with intense preionisation of the transport channel combined with a pulsed supply of the accelerating voltage to the cathode. In the optimal pressure mode, the current density at a distance of 2–3 cm from the gun outlet is 40–25 kA/cm², which will ensure ablation of most solid targets.     

High-power electron ring beams as x-ray sources for uniform irradiation of large-area objects

The paper substantiates the use of high-current megavolt diodes with a ring cathode and a high aspect ratio (R/d≫1) as radiation sources for irradiating objects with a large area (500–1000 cm²). The size of the irradiated area is shown to depend weakly on the nature of the angular dependence of the radiator for moderate energies (0.5–1.5 MeV) of accelerated electrons. Institute of Strong-Current Electronics, Siberian Branch of the Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 40–44, December, 1995.     

Inorganic reagents for testing the properties of copper nanopowders

The applicability of inorganic reagents for the rapid determination of the surface properties of copper nanopowders obtained under different conditions for the electrical explosion of a conductor and for gas-phase synthesis is considered. The thermoprogrammed desorption of ammonia is adapted to nanopowder samples. The formation of active sites in nanopowders depending on the conditions of their synthesis is analyzed.     

X-pinch source of subnanosecond soft X-ray pulses based on small-sized low-inductance current generator

For the first time, the regime of a micrometer-size hot spot formation is impemented for an X-pinch in a plasma, which is fed from a current generator based on low-inductance capacitors and rapid current switches. The configurations of X-pinches, which can be used effectively as point sources of soft X-rays with this type of current generator, are determined. A prototype of a small-size radiation source for high-resolution point projection X-ray radiography has been constructed. The main parameters of X-pinch as a radiation source are analyzed and compared with X-pinch parameters in high-voltage setups with shaping lines. An analysis of the data on the operation of X-pinches in generators with different parameters has led to simple relations that can be used to select optimal initial X-pinch parameters.     

Multipurpose transformer-type pulse generator

A high-power transformer-type pulse generator (HPPG) is described. It was designed to generate voltage pulses up to 6 MV and current pulses to 2.5 MA. Its highest pulse power is 2.5 TW. Its comparatively small dimensions and broad pulse-spectrum range combine with low cost to make it a convenient tool for physical research in smaller laboratories. Deceased. Institute of High-Current Electronics, Siberian Division, Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchenbykh Zavedenii, Fizika, No. 12, pp. 67–75, December, 1997.