Interpretation of artifacts in Fourier transform infrared spectra of atmospheric pressure dielectric barrier discharges: relationship with the plasma frequency between 300 Hz and 15 kHz

This article describes the occurrence of a phenomenon that is observed while recording mid-infrared (4000-700 cm−1) absorption spectra of dielectric barrier discharges sustained at frequencies ranging from 300 Hz to 15 kHz. This phenomenon is observed as the presence of very sharp spikes in the spec...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2020-01, Vol.53 (1), p.15201
Main Authors: Milaniak, N, Audet, P, Griffiths, P R, Massines, F, Laroche, G
Format: Article
Language:English
Subjects:
atmospheric pressure plasma
dielectric barrier discharge
Engineering Sciences
Fourier transform infrared spectroscopy
high-voltage plasma excitation frequency
interferogram sampling frequency
Physics
Plasma Physics
Plasmas
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Summary:This article describes the occurrence of a phenomenon that is observed while recording mid-infrared (4000-700 cm−1) absorption spectra of dielectric barrier discharges sustained at frequencies ranging from 300 Hz to 15 kHz. This phenomenon is observed as the presence of very sharp spikes in the spectrum, for which the wavenumber depends on both the high voltage frequency used to generate the discharge and the velocity of the moving mirror of the interferometer (which in turn determines the interferogram sampling frequency). While it is well known that the consumption of gas precursor within plasmas can be followed, we demonstrate that Fourier transform infrared spectroscopy also makes it possible to monitor frequencies and coupling of excitation mechanisms occurring in the plasma.
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/ab4777