Accession Number : ADA134115

Title :   Plasma Theory and Simulation.

Descriptive Note : Quarterly progress rept. no. 4, 1 Oct-31 Dec 81,


Personal Author(s) : Birdsall,C K

PDF Url : ADA134115

Report Date : 31 Dec 1981

Pagination or Media Count : 12

Abstract : As discussed in a previous document, the ion distribution function in the thermal-barrier region of a tandem mirror machine can be unstable to electrostatic and/or electromagnetic two-stream modes. In this document the author examines the analytic stability in an infinite medium of those electronic ion-ion two-stream modes which have their wave vector, k, parallel to the axial magnetic field (this is equivalent to examining 1-d localized stability). The point of our doing inhomogenous simulations is precisely to examine any non-infinite medium effects on the instability in a thermal barrier. Any unstable ion-ion two-stream modes are expected to have wavelengths of order wavelength di; since the thermal-barrier cell itself is much longer that this, our analytic (local) approximation will provide at least a zeroth-order estimate of instability as well as a reference from which to measure any inhomogenity effects recovered later by our particle simulation runs.

Descriptors :   *Plasmas(Physics), *Ion ion interactions, Distribution functions, Cells, Barriers, Heating, Electrostatics, Stability, Waves, Vector analysis, Magnetic fields, Simulation, Homogeneity, Approximation(Mathematics), Estimates, Ion beams, Collisions, Electromagnetic properties, Electrons, High density, Trapping(Charged particles)

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE