J 2017

State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface

VORÁČ, Jan, Petr SYNEK, Vojtěch PROCHÁZKA and Tomáš HODER

Basic information

Original name

State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface

Authors

VORÁČ, Jan (203 Czech Republic, guarantor, belonging to the institution), Petr SYNEK (203 Czech Republic, belonging to the institution), Vojtěch PROCHÁZKA (203 Czech Republic, belonging to the institution) and Tomáš HODER (203 Czech Republic, belonging to the institution)

Edition

JOURNAL OF PHYSICS D-APPLIED PHYSICS, Bristol, IOP Publishing, 2017, 0022-3727

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10305 Fluids and plasma physics

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 2.373

RIV identification code

RIV/00216224:14310/17:00094824

Organization unit

Faculty of Science

DOI

UT WoS

000404719700001

Keywords in English

optical emission spectroscopy; batch processing; massiveOES; spectra fitting; atmospheric pressure; surface barrier discharge; triple-line

Tags

Změněno: 11/4/2018 23:42, Ing. Nicole Zrilić

Abstract

V originále

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.

Links

CZ.1.05/2.1.00/03.0086, interní kód MU
Name: CEPLANT - Regionální VaV centrum pro nízkonákladové plazmové a nanotechnologické povrchové úpravy
Investor: Ministry of Education, Youth and Sports of the CR, 2.1 Regional R&D Centres
GJ16-09721Y, research and development project
Name: Pokročilé experimentální studium přechodných povrchových výbojů
Investor: Czech Science Foundation
LO1411, research and development project
Name: Rozvoj centra pro nízkonákladové plazmové a nanotechnologické povrchové úpravy (Acronym: CEPLANT plus)
Investor: Ministry of Education, Youth and Sports of the CR