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Title: Fundamental limitations of the local approximation for electron distribution function and fluid model in bounded plasmas

It is shown that the local approximation for computing the electron distribution function depends both on the ratio between the energy relaxation length and a characteristic plasma length and on the ratio between heating and ambipolar electric fields. In particular, the local approximation is not valid at the discharge periphery even at high pressure due to the fact that the ambipolar electric field practically always is larger than the heating electric field.
Authors:
;  [1] ;  [2]
  1. St. Petersburg State University, St. Petersburg 198504 (Russian Federation)
  2. St. Petersburg University ITMO, St. Petersburg 197101 (Russian Federation)
Publication Date:
OSTI Identifier:
22403311
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 12; 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; APPROXIMATIONS; DISTRIBUTION FUNCTIONS; ELECTRIC FIELDS; FLUIDS; PLASMA; PRESSURE RANGE MEGA PA 10-100