skip to main content

Title: On the ion front of a plasma expanding into a vacuum

Calculations are reported on the expansion of a plasma into a vacuum, using a model of cold ions and Boltzmann electrons. The initial distribution of the ions at the edge of the plasma greatly affects the subsequent expansion. An initial abrupt drop of ion density leads to an expansion in which the abrupt drop is maintained. A finite slope, however, leads to the formation of a peak of ion density at the ion front. The subsequent behaviour may lead to wave breaking and the formation of multi-valued ion velocity distributions.
Authors:
 [1] ;  [2] ;  [3]
  1. OCIAM, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom)
  2. (United Kingdom)
  3. Department of Scientific Computing, Florida State University, Tallahassee, Florida 32306 (United States)
Publication Date:
OSTI Identifier:
22251837
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 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; ELECTRONS; ION DENSITY; IONS; PLASMA; VELOCITY