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Title: Self-organized pattern formation of an atmospheric pressure plasma jet in a dielectric barrier discharge configuration

Abstract

This letter reports the observation of self-organized patterns formed in a 29 mm wide atmospheric pressure plasma jet. By altering the gas flow rate and/or the applied voltage, the plasma jet is seen to have at least three different modes, namely, a diffuse-looking discharge, a self-organized discharge, and an unstable discharge with randomly occurring plasma channels. The self-organized discharge mode is characterized by several bright plasma channels embedded in a diffuse and dim plasma background. These plasma channels are regularly spaced from each other and their self-organized patterns are shown to evolve abruptly.

Authors:
; ; ; ; ;  [1];  [2]
  1. State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023 (China)
  2. (United Kingdom)
Publication Date:
OSTI Identifier:
20971942
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 22; Other Information: DOI: 10.1063/1.2745204; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATMOSPHERIC PRESSURE; DIELECTRIC MATERIALS; ELECTRIC DISCHARGES; ELECTRIC POTENTIAL; GAS FLOW; NONLINEAR PROBLEMS; PLASMA; PLASMA INSTABILITY; PLASMA JETS

Citation Formats

Nie Qiuyue, Ren Chunsheng, Wang Dezhen, Li Shouzhe, Zhang Jialiang, Kong, M. G., and Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU. Self-organized pattern formation of an atmospheric pressure plasma jet in a dielectric barrier discharge configuration. United States: N. p., 2007. Web. doi:10.1063/1.2745204.
Nie Qiuyue, Ren Chunsheng, Wang Dezhen, Li Shouzhe, Zhang Jialiang, Kong, M. G., & Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU. Self-organized pattern formation of an atmospheric pressure plasma jet in a dielectric barrier discharge configuration. United States. doi:10.1063/1.2745204.
Nie Qiuyue, Ren Chunsheng, Wang Dezhen, Li Shouzhe, Zhang Jialiang, Kong, M. G., and Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU. Mon . "Self-organized pattern formation of an atmospheric pressure plasma jet in a dielectric barrier discharge configuration". United States. doi:10.1063/1.2745204.
@article{osti_20971942,
title = {Self-organized pattern formation of an atmospheric pressure plasma jet in a dielectric barrier discharge configuration},
author = {Nie Qiuyue and Ren Chunsheng and Wang Dezhen and Li Shouzhe and Zhang Jialiang and Kong, M. G. and Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU},
abstractNote = {This letter reports the observation of self-organized patterns formed in a 29 mm wide atmospheric pressure plasma jet. By altering the gas flow rate and/or the applied voltage, the plasma jet is seen to have at least three different modes, namely, a diffuse-looking discharge, a self-organized discharge, and an unstable discharge with randomly occurring plasma channels. The self-organized discharge mode is characterized by several bright plasma channels embedded in a diffuse and dim plasma background. These plasma channels are regularly spaced from each other and their self-organized patterns are shown to evolve abruptly.},
doi = {10.1063/1.2745204},
journal = {Applied Physics Letters},
number = 22,
volume = 90,
place = {United States},
year = {Mon May 28 00:00:00 EDT 2007},
month = {Mon May 28 00:00:00 EDT 2007}
}
  • A two-dimensional fluid model is developed to simulate the one-dimensional self-organized patterns in an atmospheric-pressure dielectric barrier discharge (DBD) driven by sinusoidal voltage in argon. Under certain conditions, by changing applied voltage amplitude, the transversely uniform discharge can evolve into the patterned discharge and the varied self-organized patterned discharges with different numbers and arrangements of discharge channels can be observed. Similar to the uniform atmospheric-pressure DBD, the patterned discharge mode is found to undergo a transition from Townsend regime, sub-glow regime to glow regime with increasing applied voltage amplitude. In the different regimes, charged particles and electric field display differentmore » dynamical behaviors. If the voltage amplitude is increased over a certain value, the discharge enters an asymmetric patterned discharge mode, and then transforms into the spatially chaotic state with out-of-order discharge channels. The reason for forming the one-dimensional self-organized pattern is mainly due to the so-called activation-inhibition effect resulting from the local high electron density region appearing in discharge space. Electrode arrangement is the reason that induces local high electron density.« less
  • The excitation dynamics within the main plasma production region and the plasma jets of a kHz atmospheric pressure dielectric barrier discharge (DBD) jet operated in helium was investigated. Within the dielectric tube, the plasma ignites as a streamer-type discharge. Plasma jets are emitted from both the powered and grounded electrode end; their dynamics are compared and contrasted. Ignition of these jets are quite different; the jet emitted from the powered electrode is ignited with a slight time delay to plasma ignition inside the dielectric tube, while breakdown of the jet at the grounded electrode end is from charging of themore » dielectric and is therefore dependent on plasma production and transport within the dielectric tube. Present streamer theories can explain these dynamics.« less
  • A magnetic field is introduced to the dielectric-barrier discharge enhanced direct-current glow discharge for efficient plasma generation, with the discharge power of 2.7 W and total energy consumption reduced to 34% of the original. By spatially examining the emission spectra and plasma temperature, it is found that their peaks shift from edges to the center and the negative and anode glows merge into the positive column and disappear, accompanied by improvement of uniformity and chemical activity of the enlarged plasma. This lies in the enhancement of ionization in the curved and lengthened electron path and the dispersion of discharge domains.
  • A stable nonthermal quasiuniform planar plasma jet, originating from a planar dielectric duct with a rectangular exit and issuing into ambient air at atmospheric pressure, is reported in the present work. Current-voltage characteristics, one discharge current pulse per sinusoidal half voltage cycle, show that the discharge is not filamentary. Its spatial uniformity in the transverse direction is shown to be excellent by monitoring optical emission spectra in the jet core region except jet boundaries. This is possibly resulted from high preionization in the upstream region, and it is a challenge to the traditional single streamer explanation for nonthermal plasma jets.
  • A stable nonthermal laminar atmospheric-pressure plasma source equipped with dielectric-barrier discharge was developed to realize more efficient plasma generation, with the total energy consumption reduced to nearly 25% of the original. Temperature and emission spectra monitoring indicates that this plasma is uniform in the lateral direction of the jet core region. It is also found that this plasma contains not only abundant excited argon atoms but also sufficient excited N{sub 2} and OH. This is mainly resulted from the escape of abundant electrons from the exit, due to the sharp decrease of sustaining voltage and the coupling between ions andmore » electrons.« less