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Title: Self-pulsing in a low-current hollow cathode discharge: From Townsend to glow discharge

We investigate the self-pulsing phenomenon of a low current cavity discharge in a cylindrical hollow cathode in pure argon. The waveforms of pulsed current and voltage are measured, and the time-averaged and time-resolved images of hollow cathode discharge are recorded by using high-speed intensified charge coupled device camera. The results show that the self-pulsing is a mode transition between low-current stage of Townsend discharge and high-current stage of glow discharge. During the self-pulsing, the current rising time relates to the dissipation of space charges, and the decay time relates to the reconstruction of the virtual anode by the accumulation of positive ions. Whether or not space charges can form and keep the virtual anode is responsible for the discharge mode and hence plays an important role in the self-pulsing phenomenon in low current hollow cathode discharge.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1]
  1. School of Physics, Beijing Institute of Technology, Beijing 100081 (China)
  2. (China)
  3. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081 (China)
Publication Date:
OSTI Identifier:
22493890
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; ANODES; ARGON; CAMERAS; CATIONS; CHARGE-COUPLED DEVICES; CYLINDRICAL CONFIGURATION; ELECTRIC POTENTIAL; GLOW DISCHARGES; HOLLOW CATHODES; IMAGES; PULSES; SPACE CHARGE; TIME RESOLUTION; TOWNSEND DISCHARGE; WAVE FORMS