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Monte Carlo modelling of plasma extinction by neutral particles requires energy and momentum sinks to be determined with sufficient statistical significance. We focus on this aspect using calculations of an idealized 1-dimensional plasma-gas interface with the EIRENE code. A novel non-linear version including self-collisions amongst neutral particles is also applied to admit gas viscosity. It emerges that statistically significant momentum losses often cannot practicably be determined, even at modest plasma temperatures (10 eV), using conventional collision-estimator techniques. Gas viscosity effects also tend to inhibit extraction of plasma momentum and hinder extinction. Certain possibilities to improve numerical methods are mentioned.

Additional information

Authors: MADDISON G P, AEA Fusion, Culham Laboratory, Abingdon, Oxon. (GB);REITER P, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE);HUGILL J, University of Manchester Institute of Science and Technology, Department of Physics (GB)
Bibliographic Reference: Report: UKAEA FUS 343 EN (1996) 12pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon, OX14 3DB (GB)
Record Number: 199611304 / Last updated on: 1996-11-11
Original language: en
Available languages: en