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Title: Dynamics of the microstructure of current channels and the generation of high-energy electrons in nanosecond discharges in air

The results of the three-dimensional numerical simulation of the dynamics of the microstructure of high-voltage nanosecond discharges in air at atmospheric pressure are presented. It is established that the fast (at a time of ≈10 ns) broadening and significant decrease in the gas concentration in the microchannels occur as a result of the ohmic heating of microchannels with the diameter of 1–30 μm. It was shown that the broadening of microchannels in a nanosecond diffusive discharge provides an increase in the ratio of the electric field strength to the gas concentration in microchannels to values sufficient for the generation highenergy electron beams and X-ray bremsstrahlung in them. Features of the dynamics of the system of microchannels and its effect on the efficiency of the generation of high-energy electrons in discharges developing in the microstructuring regime of the current channels are considered.
Authors:
; ;  [1]
  1. Russian Federal Nuclear Center VNIIEF (Russian Federation)
Publication Date:
OSTI Identifier:
22471894
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 12; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR; BREMSSTRAHLUNG; COMPUTERIZED SIMULATION; CONCENTRATION RATIO; ELECTRIC CURRENTS; ELECTRIC DISCHARGES; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRON BEAMS; ELECTRONS; MICROSTRUCTURE; THREE-DIMENSIONAL LATTICES