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Title: Role of ambient dielectric in propagation of Ar atmospheric pressure nonequilibrium plasma jets

A single-electrode atmospheric pressure nonequilibrium plasma jet surrounded with different ambient dielectrics is investigated driven by AC power supply. Another three ambient dielectrics, distilled water, ethanol, and carbon tetrachloride, are adopted to compare with air. By examining electrical and optical characteristics, it was found that the molecular polarity of ambient dielectrics had its significant effect on the propagation of atmospheric pressure nonequilibrium plasma jets. When the polarization of molecules was enhanced, the discharge current and the bullet velocity were also increased. For nonpolar dielectric of carbon tetrachloride, this was mainly resulted from the electron polarization in the built-in electric field. For polar dielectrics of ethanol and distilled water, in addition to the electron polarization, orientation polarization was the main cause for the further increase in discharge current and bullet velocity.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)
  2. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001 (China)
  3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023 (China)
Publication Date:
OSTI Identifier:
22410279
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; 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; AIR; ARGON; ATMOSPHERIC PRESSURE; CARBON TETRACHLORIDE; DIELECTRIC MATERIALS; ELECTRIC FIELDS; ELECTRODES; ELECTRONS; ETHANOL; NON-EQUILIBRIUM PLASMA; PLASMA JETS; POLARIZATION; POWER SUPPLIES; WATER