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Title: Simulation of a runaway electron avalanche developing in an atmospheric pressure air discharge

To gain a better understanding of the operation of atmospheric pressure air discharges, the formation of a runaway electron beam at an individual emission site on the cathode has been numerically simulated. The model provides a description of the dynamics of the fast electrons emitted into an air gap from the surface of the emission zone by solving numerically two-dimensional equations for the electrons. It is supposed that the electric field at the surface of the emission zone is enhanced, providing conditions for continuous acceleration of the emitted electrons. It is shown that the formation of a runaway electron beam in a highly overvolted discharge is largely associated with avalanche-type processes and that the number of electrons in the avalanche reaches 50% of the total number of runaway electrons.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [2]
  1. P. N. Lebedev Physical Institute, RAS, 119991 Moscow (Russian Federation)
  2. (Russian Federation)
  3. Institute of High Current Electrons, SB, RAS, 634055 Tomsk (Russian Federation)
Publication Date:
OSTI Identifier:
22489966
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR; ATMOSPHERIC PRESSURE; AVALANCHE QUENCHING; CATHODES; ELECTRIC DISCHARGES; ELECTRIC FIELDS; ELECTRON BEAMS; EMISSION; RUNAWAY ELECTRONS; TWO-DIMENSIONAL CALCULATIONS