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Temporal and spectral characteristics of atmospheric pressure argon plasma jet *

Published online by Cambridge University Press:  18 February 2013

Jüri Raud ,
Indrek Jõgi ,
Matti Laan  and
Marti Laast
Jüri Raud*
Affiliation:
Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia
Indrek Jõgi
Affiliation:
Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia
Matti Laan
Affiliation:
Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia
Marti Laast
Affiliation:
Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia
*
ae-mail: jyri.raud@ut.ee
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Abstract

An investigation of atmospheric pressure argon DBD plasma jet generated at 6 kHz sinusoidal voltage was carried out. On the basis of recorded electrical, optical and spectral characteristics spatiotemporal evolution of plasma jet in negative and positive half-cycles of voltage was studied. It was found that the dynamics of argon jet propagation outside the tube differs considerably from that found by other authors in the case of helium jet. The difference was explained with the influence of Penning reactions between metastable state He atoms and air molecules in He jet. On the basis of radiative transitions N2 (C-B, 0-0) and OH(A-X, 0-0) the rotational temperatures of N2(C, 0) and OH(A, 0) were estimated along jet axis. In regions where Ar-air mixing was negligible or low, the rotational temperatures of both molecules coincide and were close to the gas temperature.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 61 , Issue 2: Topical issue: 13th International Symposium on High Pressure Low Temperature Plasma Chemistry (Hakone XIII). Edited by Nicolas Gherardi, Henryca Danuta Stryczewska and Yvan Ségui , February 2013 , 24326
Copyright
© EDP Sciences, 2013

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Footnotes

*

Contribution to the Topical Issue “13th International Symposium on High Pressure Low Temperature Plasma Chemistry (Hakone XIII)”, Edited by Nicolas Gherardi, Henryca Danuta Stryczewska and Yvan Ségui.

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