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Pulsed discharges, especially with fast rise time and high over-voltage, usually accompany by some specific pheromones in the nonuniform electric field. In this paper, the appearance of bright spots on the electrodes in air breakdown and the inversion of polarity effect in SF6 breakdown are investigated. Experiments were carried out by using three experimental setups with a full width at half maximum...
In this work, we performed experiments to examine the conditions under which a runaway electron beam moves not only toward the anode but also backward (to the space downstream of the cathode). For recording a backward runaway electron beam, a positive voltage pulse was applied to the highvoltage electrode of the gas diode. The breakdown of atmospheric pressure air gaps with a special cathode design...
In this paper, characteristics of the runaway electron beams downstream of a foil anode were studied at a pressure of helium, hydrogen, and nitrogen from vacuum to tens of torr. High-voltage pulses (∼150 and ∼250 kV) with pulse rise times of ∼300 and ∼500 ps were applied to the tubular cathode — plane anode gap. It is demonstrated that increasing the pressure from vacuum to 10 of torr and more changes...
A design of the electron accelerator for excimer laser pumping is presented. The accelerator produces an electron beam of 250-keV electron energy, 20 × 140-cm beam cross-section with a beam current density up to 8.5 A/cm at 1+5.4 us pulse length. The methods for calculating an accelerator geometry are considered. Energy characteristics of laser radiation are presented, a radiation energy of 25 J being...
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