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The influence of the addition of argon gas to air DB discharge

Published online by Cambridge University Press:  06 June 2012

D.M. El-Zeer ,
N. Dawood ,
F. Elakshar  and
A.A. Garamoon
D.M. El-Zeer
Affiliation:
Center of Plasma Technology, Azhar University, Egypt
N. Dawood
Affiliation:
Applied Physics Department, Faculty of Applied Science, Taibah University, KSA
F. Elakshar
Affiliation:
Center of Plasma Technology, Azhar University, Egypt
A.A. Garamoon*
Affiliation:
Center of Plasma Technology, Azhar University, Egypt
*
ae-mail: abdougaramoon@hotmail.com
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Abstract

Effects of admixing argon to air DB discharge, at atmospheric pressure, on the electrical and optical emission characteristics have been studied. Optical emission spectroscopy is used to investigate the effect of argon admixing on the emission intensity of the nitrogen second positive systems (300–450 nm) and its relative population of N2(C3Πu,v′) state. Also the vibrational temperature of the nitrogen second positive systems has been calculated for the sequence Δv = −2, that follows Boltzmann’s distribution. It was found that the vibrational temperature of second positive system can be raised significantly from 0.31 to 0.35 eV in air dielectric barrier discharge (DBD) plasma at discharge current 0.5 mA with admixing of Ar gas at flow rate of 3 L/min. Admixing of argon to air DB discharge also enhances the discharge current, the electron density and the consumed power. Mechanisms of excitation and ionization processes of nitrogen molecules in this mixture have been studied. Processes which are responsible for the enhancement of the population density of N2(C3Πu,v′) and its vibrational temperature have been reported.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 58 , Issue 3 , June 2012 , 30801
Copyright
© EDP Sciences, 2012

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