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Title: Modeling a short dc discharge with thermionic cathode and auxiliary anode

A short dc discharge with a thermionic cathode can be used as a current and voltage stabilizer, but is subject to current oscillation. If instead of one anode two anodes are used, the current oscillations can be reduced. We have developed a kinetic model of such a discharge with two anodes, where the primary anode has a small opening for passing a fraction of the discharge current to an auxiliary anode. The model demonstrates that the current-voltage relationship of the discharge with two anodes is characterized everywhere by positive slope, i.e., positive differential resistance. Therefore, the discharge with two anodes is expected to be stable to the spontaneous oscillation in current that is induced by negative differential resistance. As a result, such a discharge can be used in an engineering application that requires stable plasma, such as a current and voltage stabilizer.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [5] ;  [1]
  1. St. Petersburg State University, St. Petersburg 199034 (Russian Federation)
  2. (Russian Federation)
  3. (United States)
  4. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  5. West Virginia University, Morgantown, West Virginia 26506 (United States)
Publication Date:
OSTI Identifier:
22218483
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; 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; ANODES; CATHODES; COMPUTERIZED SIMULATION; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; HIGH-FREQUENCY DISCHARGES; OSCILLATIONS; PLASMA SIMULATION; PLASMA WAVES