skip to main content

Title: Study on hexagonal super-lattice pattern with surface discharges in dielectric barrier discharge

The hexagonal super-lattice pattern with surface discharges (SDs) in dielectric barrier discharge is investigated by intensified charge-coupled device. The pattern is composed of the bright spot and the dim spot which is located at the centroid of surrounding other three bright spots. The phase diagram of the pattern as a function of the gas pressure and the argon concentration is given. The instantaneous images indicate that the bright spot emerging at the front of the current pulse is formed by the volume discharge (VD), and dim spot occurring at the tail of the current pulse is formed by the SD. The above result shows that the SD is induced by the VD. The simulation of the electric fields of wall charges accumulated by VDs confirms that the dim spot is formed by the confluences of the SDs of surrounding other three bright spots. By using optical emission spectrum method, both the molecule vibration temperature and electron density of the SD are larger than that of the VD.
Authors:
; ; ; ;  [1] ;  [2]
  1. College of Physics Science and Technology, Hebei University, Baoding 071002 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22486470
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 10; Other Information: (c) 2015 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; ARGON; CHARGE-COUPLED DEVICES; CONCENTRATION RATIO; CURRENTS; DIELECTRIC MATERIALS; ELECTRIC DISCHARGES; ELECTRIC FIELDS; ELECTRON DENSITY; EMISSION SPECTRA; IMAGES; MOLECULES; PHASE DIAGRAMS; PRESSURE DEPENDENCE; PULSES; VIBRATIONAL STATES