Accession Number : ADA328243

Title :   Quasineutral Particle Simulation of Magnetized Plasma Discharges: General Formalism and Application to ECR Discharges.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC PLASMA PHYSICS DIV

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

PDF Url : ADA328243

Report Date : 31 JUL 1997

Pagination or Media Count : 52

Abstract : In quasineutral plasmas it is difficult and inefficient to calculate the electrostatic field from Poisson's equation. We have developed a particle-in-cell/Monte Carlo (PIC/MC) simulation method for magnetized discharges, in which internal electric fields and sheath potentials are determined directly from the requirement of quasineutrality. Sheaths are treated as thin potential barriers, and the Bohm criterion for ion flux into the sheath is imposed as a boundary condition. Electron plasma oscillations do not appear in the model, and the Debye length is essentially set to zero. Thus time steps and spatial gridding can be chosen to represent the macroscopic time and space scales of interest, greatly enhancing numerical efficiency. The simulation technique correctly represents kinetic features such as Landau damping. We believe it is applicable generally to a wide variety of phenomena in plasmas that may be magnetized or unmagnetized, bounded or unbounded, collisional or collisionless.

Descriptors :   *ELECTRONS, *PLASMA DEVICES, *CYCLOTRON RESONANCE, MAGNETIC FIELDS, MONTE CARLO METHOD, ARGON, ELECTROSTATIC FIELDS, POISSON EQUATION, ELECTRON PARAMAGNETIC RESONANCE, ION DENSITY, PLASMA OSCILLATION, IONIC CURRENT.

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE