Accession Number : ADA187100

Title :   Plasma Theory and Simulation.

Descriptive Note : Progress rept. no. 3 and 4, 1 Jul-31 Dec 86,

Corporate Author : CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB

Personal Author(s) : Birdsall, Charles K

PDF Url : ADA187100

Report Date : 31 Dec 1986

Pagination or Media Count : 72

Abstract : Contents: The Pierce diode linear behavior with external R, C, or L was verified very accurately by particle simulation; The Pierce diode non-linear equilibria with R, C, or L are described theoretically and explored via computer simulation; A simple model of the sheath outside the separatrix of an FRC was modeled electrostatically in 2d and large potentials due to the magnetic well and peak were found; these may explain the anomalously high ion confinement in the FRC edge layer; A planar plasma source with cold ions and warm electrons produces a source sheath with sufficient potential drop to accelerate ions to sound velocity, which obviates the need for a Bohm pre-collector-sheath electric field; Collector Sheath, Presheath, and Source Sheath in a Collisionless, Finite Ion Temperature Plasma; Potential Drop and Transport in a Bounded Plasma with Ion Reflection at the Collector; Potential Drop and Transport in a Bounded Plasma with Secondary Electron Emission at the Collector; A movie has been made displaying the long-lived vortices resulting from the Kelvin-Helmholtz instability in a magnetized sheath. A relativistic Monte Carlo binary (Coulomb) collision model has been developed and tested for inclusion into the electrostatic particle simulation code TESS; and Two direct implicit time integration schemes are tested for self-heating and self-cooling and regions of neither are found as a function of delta t and delta x for the model of a freely expanding plasma slab.

Descriptors :   *COMPUTERIZED SIMULATION, *PLASMAS(PHYSICS), *PLASMA SHEATHS, ACOUSTIC VELOCITY, CODING, COLLISIONS, CONFINEMENT(GENERAL), DIODES, EDGES, ELECTRONS, ELECTROSTATICS, INTEGRATION, IONS, LAYERS, LINEARITY, LONG LIFE, LOW TEMPERATURE, MAGNETIC FIELDS, MAGNETIZATION, MODELS, MONTE CARLO METHOD, PARTICLES, PLANAR STRUCTURES, REFLECTION, SECONDARY EMISSION, SOURCES, THEORY, TIME, VORTICES, CONFINEMENT(GENERAL)

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE