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Title: “Anomalous” collisionality in low-pressure plasmas

Based on a theoretical argument from fundamental kinetic theory, by way of simple worked examples, and through the use of particle-in-cell simulations of capacitively coupled plasmas, we demonstrate that conventional methods for calculating the momentum transfer collision frequency in low-pressure plasmas can be seriously erroneous. This potentially plays an important and previously unconsidered role in many low-pressure discharges, and at least in part provides a possible explanation for anomalous behaviour often encountered in these plasmas.
Authors:
; ;  [1] ;  [2]
  1. LPP-CNRS, Ecole Polytechnique, 91128 Palaiseau (France)
  2. School of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9 (Ireland)
Publication Date:
OSTI Identifier:
22218395
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; 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; ELECTRIC DISCHARGES; ELECTRON-ION COLLISIONS; MOMENTUM TRANSFER; PLASMA; PLASMA POTENTIAL; PLASMA PRESSURE; PLASMA SIMULATION