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Title: Radio-frequency sheath-plasma interactions with magnetic field tangency points along the sheath surface

Computer simulations of radio-frequency (RF) waves propagating across a two-dimensional (2D) magnetic field into a conducting boundary are described. The boundary condition for the RF fields at the metal surface leads to the formation of an RF sheath, which has previously been studied in one-dimensional models. In this 2D study, it is found that rapid variation of conditions along the sheath surface promote coupling of the incident RF branch (either fast or slow wave) to a short-scale-length sheath-plasma wave (SPW). The SPW propagates along the sheath surface in a particular direction dictated by the orientation of the magnetic field with respect to the surface, and the wave energy in the SPW accumulates near places where the background magnetic field is tangent to the surface.
Authors:
 [1] ; ;  [2]
  1. Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, Pennsylvania 18015 (United States)
  2. Lodestar Research Corporation, 2400 Central Avenue P-5, Boulder, Colorado 80301 (United States)
Publication Date:
OSTI Identifier:
22220648
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOUNDARY CONDITIONS; COMPUTERIZED SIMULATION; HYDROMAGNETIC WAVES; INTERACTIONS; MAGNETIC FIELDS; PLASMA CONFINEMENT; PLASMA SHEATH; PLASMA SIMULATION; PLASMA WAVES; RADIOWAVE RADIATION; SURFACES; TOKAMAK DEVICES