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Author Liu, Ying ♦ Dong, Lifang ♦ Niu, Xuejiao ♦ Gao, Yenan ♦ Zhang, Chao
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword 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
Abstract 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.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 10


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