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Numerical study of a direct current plasma sheath based on kinetic theory

TitleNumerical study of a direct current plasma sheath based on kinetic theory
Publication TypeJournal Article
Year of Publication2002
AuthorsVasenkov, AV, Shizgal, BD
JournalPhysics of Plasmas
Volume9
Pagination691-700
Date PublishedFeb
Type of ArticleArticle
ISBN Number1070-664X
KeywordsBOHM CRITERION, CATHODE FALL, COLLISIONAL, ELECTRON MOTION, HELIUM, IONS, MODEL, MONTE-CARLO SIMULATION, RF GLOW-DISCHARGES, SHEATH, TRANSITION
Abstract

A fully kinetic theory model was developed to study plasma properties of the sheath of a direct current glow discharge. This model includes a direct numerical solution of the Boltzmann equations for electron and ion distribution functions with a self-consistent electric field obtained from the Poisson equation. The calculated profiles of density, drift velocity, temperature, and electric potential were used to show the structure of the plasma sheath. The results of the direct numerical solution were compared with a particle-in-cell Monte Carlo simulation. It was also demonstrated that for a small Debye length to the ion mean-free path ratio, results obtained using the continuum sheath model, which includes two parameters, can be matched to the kinetic theory simulations. (C) 2002 American Institute of Physics.

URL<Go to ISI>://000173418700039