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Title: Ion sound instability driven by the ion flows

Ion sound instabilities driven by the ion flow in a system of a finite length are considered by analytical and numerical methods. The ion sound waves are modified by the presence of stationary ion flow resulting in negative and positive energy modes. The instability develops due to coupling of negative and positive energy modes mediated by reflections from the boundary. It is shown that the wave dispersion due to deviation from quasineutrality is crucial for the stability. In finite length system, the dispersion is characterized by the length of the system measured in units of the Debye length. The instability is studied analytically and the results are compared with direct, initial value numerical simulations.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan S7N 5E2 (Canada)
  2. (NRC “Kurchatov Institute”), Moscow (Russian Federation)
  3. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  4. National Research Centre (NRC “Kurchatov Institute”), Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
22410293
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 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; ANALYTICAL SOLUTION; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; DEBYE LENGTH; DISPERSIONS; ION ACOUSTIC WAVES; IONS; PLASMA INSTABILITY; REFLECTION