Accession Number : ADA323506

Title :   Langevin Representation of Coulomb Collisions in PIC Simulations.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC INTENSE PARTIAL BEAMS AND PLASMA PROCESSING BRANCH

Personal Author(s) : Manheimer, Wallace M. ; Lampe, Martin ; Joyce, Glenn

PDF Url : ADA323506

Report Date : 21 MAR 1997

Pagination or Media Count : 32

Abstract : An efficient grid based Langevin formulation is developed for treating electron electron (e-e) and electron ion collisions within a particle in cell plasma simulation code. The formulation is energy and momentum conserving, and is quantitatively accurate for all parts of the energy distribution. This is particularly important in calculating the approach to equilibrium of the high-energy tail, or the equilibrium under the competing influences of e-e collisions, inelastic electron neutral collisions, and end losses through sheaths. Computational examples are given illustrating both equilibrium energy distribution and approach to equilibrium.

Descriptors :   *ELECTRON SCATTERING, CELLS, PLASMAS(PHYSICS), ELASTIC PROPERTIES, EQUILIBRIUM(GENERAL).

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE