Atomic oxygen in a cold argon plasma jet: TALIF spectroscopy in ambient air with modelling and measurements of ambient species diffusion

By investigating the atomic oxygen density in its effluent, two-photon absorption laser-induced fluorescence (TALIF) spectroscopy measurements are for the first time performed in a cold argon/oxygen atmospheric pressure plasma jet. The measurements are carried out in ambient air and quenching by inf...

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Bibliographic Details
Published in:Plasma sources science & technology 2012-04, Vol.21 (2), p.24005-1-7
Main Authors: Reuter, S, Winter, J, Schmidt-Bleker, A, Schroeder, D, Lange, H, Knake, N, Schulz-von der Gathen, V, Weltmann, K-D
Format: Article
Language:English
Subjects:
Argon plasma
Atmospherics
Atomic oxygen
Density
Effluents
Exact sciences and technology
Modelling
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma properties
Spectroscopy
Transport properties
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Summary:By investigating the atomic oxygen density in its effluent, two-photon absorption laser-induced fluorescence (TALIF) spectroscopy measurements are for the first time performed in a cold argon/oxygen atmospheric pressure plasma jet. The measurements are carried out in ambient air and quenching by inflowing air species is considered. We propose a novel absorption technique in the VUV spectral range, where emission originating from within the discharge is used as light source to determine the inflow of atmospheric oxygen into the effluent. Furthermore, we propose a modelling solution for the on-axis density of inflowing ambient air based on the stationary convection-diffusion equation.
ISSN:0963-0252
1361-6595
DOI:10.1088/0963-0252/21/2/024005