Accession Number : ADA183570

Title :   Equilibrium and Wave Properties of Two-Dimensional Ion Plasmas,

Corporate Author : CALIFORNIA UNIV LOS ANGELES CENTER FOR PLASMA PHYSICS AND FUSION ENGINEERING

Personal Author(s) : Prasad, S A ; Morales, G J

PDF Url : ADA183570

Report Date : Jun 1987

Pagination or Media Count : 52

Abstract : Recent experiments have demonstrated the existence of collective modes in a two-dimensional single component ion layer residing just below the surface of liquid helium. A theory of the equilibrium and the wave properties of such a system is presented. The equilibrium is calculated by balancing the repulsive self-electric field pressure with the confining external electric field. In the limit of temperature T = O, the plasma is in the form of a constant density disk at the edge of which the density decreases to zero with a scale length set by the dimensions of the enclosing cylindrical box; increasing T increases the width of the transition region. Modelling the ions as a cold two-dimensional fluid, it is found that the plasma supports an infinite set of radial modes for each value of L, the azimuthal mode number. Imposition of a constant magnetic field perpendicular to the charge sheet increases the frequency of the L = O modes and for L does not O. splits each mode into two; the lowest of these split modes is related to the diocotron mode.

Descriptors :   *PLASMAS(PHYSICS), *LIQUID HELIUM, AZIMUTH, BOXES, CYLINDRICAL BODIES, DENSITY, ELECTRIC FIELDS, EQUILIBRIUM(GENERAL), EXTERNAL, INFINITE SERIES, IONS, LIQUID HELIUM, LOW TEMPERATURE, MAGNETIC FIELDS, PLASMAS(PHYSICS), SET THEORY, SUPPORTS, SURFACES, TWO DIMENSIONAL, PLASMA WAVES

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE