https://doi.org/10.1051/epjap/2013120432
Temporal and spectral characteristics of atmospheric pressure argon plasma jet *
Institute of Physics, University of Tartu, Tähe 4, 51010 Tartu, Estonia
a e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
1
October
2012
Revised:
2
December
2012
Accepted:
8
January
2013
Published online:
18
February
2013
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.
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.
© EDP Sciences, 2013
