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An analysis of transverse evolution of electron swarms in gases using moment equations and a propagator method

Hirotake Sugawara and Y Sakai

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A simulation technique for the analysis of the transverse evolution of electron swarms in gases was developed based on moment equations derived from the Boltzmann equation. A numerical calculation of the moment equations for an electron swarm was performed using a propagator method and it was demonstrated that the propagator method can be used to calculate the higher-order transverse diffusion coefficients stably. Applying a Hermite expansion technique, the electron distribution in real space and other electron swarm parameters were derived as functions of the transverse position. The calculation result was verified by comparisons with those by a Monte Carlo simulation and other methods. Features of the transverse electron swarm evolution were presented.


PACS

51.20.+d Viscosity, diffusion, and thermal conductivity

51.10.+y Kinetic and transport theory of gases

Subjects

Plasma physics

Dates

Issue 14 (21 July 1999)

Received 27 April 1999



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