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Title: Phenomena of oscillations in atmospheric pressure direct current glow discharges

Self-sustained oscillations in a dc glow discharge with a semiconductor layer at atmospheric pressure were investigated by means of a one-dimensional fluid model. It is found that the dc glow discharge initially becomes unstable in the subnormal glow region and gives rise to oscillations of plasma parameters. A variety of oscillations with one or more frequencies have been observed under different conditions. The discharge oscillates between the glow discharge mode and the Townsend discharge mode in the oscillations with large amplitude while operates in the subnormal glow discharge mode all the while in the oscillations with small amplitude. Fourier Transform spectra of oscillations reveal the transition mechanism between different oscillations. The effects of semiconductor conductivity on the oscillation frequency of the dominant mode, gas voltage, as well as the discharge current have also been analyzed.
Authors:
 [1] ; ;  [2]
  1. College of Physics Science and Technology, Hebei University, Baoding 071002 (China)
  2. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)
Publication Date:
OSTI Identifier:
22218326
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; 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; ATMOSPHERIC PRESSURE; BOUNDARY LAYERS; DIRECT CURRENT; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; FOURIER TRANSFORMATION; GLOW DISCHARGES; ONE-DIMENSIONAL CALCULATIONS; OSCILLATIONS; PLASMA WAVES; SEMICONDUCTOR MATERIALS; TOWNSEND DISCHARGE