Simulation of Gas Ionization by Fast Electrons

The impact ionization of a rarefied gas by high-energy electrons is considered. An approximate hydrodynamic model of the current density of low-energy secondary electrons formed during impact ionization is constructed. The concentration, drift velocity, and specific energy are calculated by an appro...

Full description

Saved in:
Bibliographic Details
Published inMathematical models and computer simulations Vol. 14; no. 4; pp. 625 - 632
Main Authors Berezin, A. V., Markov, M. B., Kosarev, O. S., Parot’kin, S. V., Tarakanov, I. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2022
Springer Nature B.V
Subjects
Distribution functions
Drift
Electric fields
Gas ionization
High energy electrons
Homogeneity
Isotropy
Kinetic equations
Mathematical Modeling and Industrial Mathematics
Mathematics
Mathematics and Statistics
Rarefied gases
Simulation and Modeling
Specific energy
impact ionization
specific energy
electromagnetic field
electron
current density
concentration
distribution function
Online AccessGet full text

Cover

More Information
Summary:The impact ionization of a rarefied gas by high-energy electrons is considered. An approximate hydrodynamic model of the current density of low-energy secondary electrons formed during impact ionization is constructed. The concentration, drift velocity, and specific energy are calculated by an approximate solution of the kinetic equation for secondary electrons. Spatial homogeneity, isotropy of the initial distribution of secondary electrons, coincidence of the direction of their drift and the electric field are assumed. Additional approximations are related to the structure of the distribution function of secondary electrons and cross section averaging. The results of model validation by comparison with direct collision simulation are presented.
ISSN:2070-0482
2070-0490
DOI:10.1134/S2070048222040020