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Title: Control of plasma properties in a short direct-current glow discharge with active boundaries

To demonstrate controlling electron/metastable density ratio and electron temperature by applying negative voltages to the active (conducting) discharge wall in a low-pressure plasma with nonlocal electron energy distribution function, modeling has been performed in a short (lacking the positive-column region) direct-current glow discharge with a cold cathode. The applied negative voltage can modify the trapping of the low-energy part of the energetic electrons that are emitted from the cathode sheath and that arise from the atomic and molecular processes in the plasma within the device volume. These electrons are responsible for heating the slow, thermal electrons, while production of slow electrons (ions) and metastable atoms is mostly due to the energetic electrons with higher energies. Increasing electron temperature results in increasing decay rate of slow, thermal electrons (ions), while decay rate of metastable atoms and production rates of slow electrons (ions) and metastable atoms practically are unchanged. The result is in the variation of electron/metastable density ratio and electron temperature with the variation of the wall negative voltage.
Authors:
 [1] ;  [1] ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. Air Force Research Laboratory, WPAFB, Ohio 45433 (United States)
  2. (United States)
  3. St. Petersburg State University, St. Petersburg 199034 (Russian Federation)
  4. West Virginia University, Morgantown, West Virginia 26506 (United States)
  5. St. Petersburg University of State Fire Service of EMERCOM RF, Murmansk Branch, Murmansk 183040 (Russian Federation)
Publication Date:
OSTI Identifier:
22493892
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 2; Other Information: (c) 2016 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; CATHODES; DIRECT CURRENT; ELECTRIC POTENTIAL; ELECTRON EMISSION; ELECTRON TEMPERATURE; ENERGY SPECTRA; GLOW DISCHARGES; HEATING; IONS; PLASMA; POSITIVE COLUMN; PRESSURE RANGE KILO PA; SIMULATION; TAIL ELECTRONS; TRAPPING