Equilibrium and Wave Properties of Two-Dimensional Ion Plasmas,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA183570
Entities
People
- George J. Morales
- S. A. Prasad
Organizations
- University of California, Los Angeles