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Title: Current flow instability and nonlinear structures in dissipative two-fluid plasmas

Abstract

The current flow in two-fluid plasma is inherently unstable if plasma components (e.g., electrons and ions) are in different collisionality regimes. A typical example is a partially magnetized E × B plasma discharge supported by the energy released from the dissipation of the current in the direction of the applied electric field (perpendicular to the magnetic field). Ions are not magnetized so they respond to the fluctuations of the electric field ballistically on the inertial time scale. In contrast, the electron current in the direction of the applied electric field is dissipatively supported either by classical collisions or anomalous processes. The instability occurs due to a positive feedback between the electron and ion current coupled by the quasi-neutrality condition. The theory of this instability is further developed taking into account the electron inertia, finite Larmor radius and nonlinear effects. It is shown that this instability results in highly nonlinear quasi-coherent structures resembling breathing mode oscillations in Hall thrusters.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [3];  [3]
  1. Univ. of Saskatchewan, Saskatoon, SK (Canada). Dept. of Physics and Engineering Physics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Univ. of Saskatchewan, Saskatoon, SK (Canada)
Sponsoring Org.:
USDOE; US Air Force Office of Scientific Research (AFOSR); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1502008
Report Number(s):
LLNL-JRNL-752795
Journal ID: ISSN 1070-664X; 939259
Grant/Contract Number:  
AC52-07NA27344; FA9550-15-1-0226
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Koshkarov, O., Smolyakov, A. I., Romadanov, I. V., Chapurin, O., Umansky, M. V., Raitses, Y., and Kaganovich, I. D. Current flow instability and nonlinear structures in dissipative two-fluid plasmas. United States: N. p., 2017. Web. doi:10.1063/1.5017521.
Koshkarov, O., Smolyakov, A. I., Romadanov, I. V., Chapurin, O., Umansky, M. V., Raitses, Y., & Kaganovich, I. D. Current flow instability and nonlinear structures in dissipative two-fluid plasmas. United States. doi:10.1063/1.5017521.
Koshkarov, O., Smolyakov, A. I., Romadanov, I. V., Chapurin, O., Umansky, M. V., Raitses, Y., and Kaganovich, I. D. Wed . "Current flow instability and nonlinear structures in dissipative two-fluid plasmas". United States. doi:10.1063/1.5017521. https://www.osti.gov/servlets/purl/1502008.
@article{osti_1502008,
title = {Current flow instability and nonlinear structures in dissipative two-fluid plasmas},
author = {Koshkarov, O. and Smolyakov, A. I. and Romadanov, I. V. and Chapurin, O. and Umansky, M. V. and Raitses, Y. and Kaganovich, I. D.},
abstractNote = {The current flow in two-fluid plasma is inherently unstable if plasma components (e.g., electrons and ions) are in different collisionality regimes. A typical example is a partially magnetized E × B plasma discharge supported by the energy released from the dissipation of the current in the direction of the applied electric field (perpendicular to the magnetic field). Ions are not magnetized so they respond to the fluctuations of the electric field ballistically on the inertial time scale. In contrast, the electron current in the direction of the applied electric field is dissipatively supported either by classical collisions or anomalous processes. The instability occurs due to a positive feedback between the electron and ion current coupled by the quasi-neutrality condition. The theory of this instability is further developed taking into account the electron inertia, finite Larmor radius and nonlinear effects. It is shown that this instability results in highly nonlinear quasi-coherent structures resembling breathing mode oscillations in Hall thrusters.},
doi = {10.1063/1.5017521},
journal = {Physics of Plasmas},
number = 1,
volume = 25,
place = {United States},
year = {2017},
month = {12}
}

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