Abstract
A volume electric gas discharge was obtained using a pulsed inhomogeneous electric field without a preionization source in various gases (nitrogen, air, helium, neon, argon, krypton) at elevated pressures. In air at atmospheric pressure and nanosecond voltage pulses, the specific energy deposited in the gas amounted up to ∼1 J/cm3. The mechanism of the volume discharge formation is related to the appearance of fast (keV-energy) electrons emitted from plasma formations at the cathode. Fast electrons provide for the effective preionization of the gas in the interelectrode space and favor the formation of volume discharge. Under these conditions, the maximum voltage drop across the discharge gap is achieved in the quasi-stationary stage of discharge.
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