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@article{1384836,
author = {Voráč, Jan and Synek, Petr and Procházka, Vojtěch and Hoder, Tomáš},
article_location = {Bristol},
article_number = {29},
doi = {http://dx.doi.org/10.1088/1361-6463/aa7570},
keywords = {optical emission spectroscopy; batch processing; massiveOES; spectra fitting; atmospheric pressure; surface barrier discharge; triple-line},
language = {eng},
issn = {0022-3727},
journal = {JOURNAL OF PHYSICS D-APPLIED PHYSICS},
title = {State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface},
url = {https://doi.org/10.1088/1361-6463/aa7570},
volume = {50},
year = {2017}
}
TY - JOUR
ID - 1384836
AU - Voráč, Jan - Synek, Petr - Procházka, Vojtěch - Hoder, Tomáš
PY - 2017
TI - State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface
JF - JOURNAL OF PHYSICS D-APPLIED PHYSICS
VL - 50
IS - 29
SP - nestránkováno
EP - nestránkováno
PB - IOP Publishing
SN - 00223727
KW - optical emission spectroscopy
KW - batch processing
KW - massiveOES
KW - spectra fitting
KW - atmospheric pressure
KW - surface barrier discharge
KW - triple-line
UR - https://doi.org/10.1088/1361-6463/aa7570
L2 - https://doi.org/10.1088/1361-6463/aa7570
N2 - Optical emission spectroscopy applied to non-equilibrium plasmas in molecular gases can give important information on basic plasma parameters, including the rotational and vibrational temperatures and densities of the investigated radiative states. In order to precisely understand the non-equilibrium of rotational-vibrational state distribution from the investigated spectra without limiting presumptions, a state-by-state temperature-independent fitting procedure is the ideal approach. In this paper, we present a novel software tool developed for this purpose, freely available for the scientific community. The introduced tool offers a convenient way to construct Boltzmann plots even from partially overlapping spectra, in a user-friendly environment. We apply the novel software to the challenging case of OH spectra in surface streamer discharges generated from the triple-line of the argon/water/dielectrics interface. After the barrier discharge is characterised by ICCD and electrical measurements, the spatially and phase resolved rotational temperatures from N2(C-B) and OH(A-X) spectra are determined and compared. The precise analysis shows that OH(A) states with quantum numbers (v'=0, 9 <= N' <= 13) are overpopulated with respect to the found two-Boltzmann distribution. We hypothesise that fast vibrational-energy transfer is responsible for this phenomenon, observed here for the first time. Finally, the vibrational temperature of the plasma and the relative populations of hot and cold OH(A) states are quantified spatially and phase resolved.
ER -
VORÁČ, Jan, Petr SYNEK, Vojtěch PROCHÁZKA and Tomáš HODER. State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface. \textit{JOURNAL OF PHYSICS D-APPLIED PHYSICS}. Bristol: IOP Publishing, 2017, vol.~50, No~29, p.~nestránkováno, 14 pp. ISSN~0022-3727. Available from: https://dx.doi.org/10.1088/1361-6463/aa7570.
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