Monitoring active species in an atmospheric pressure dielectric-barrier discharge: Observation of the Herman-infrared system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00474532" target="_blank" >RIV/61388955:_____/17:00474532 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/ctpp.201600061" target="_blank" >http://dx.doi.org/10.1002/ctpp.201600061</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ctpp.201600061" target="_blank" >10.1002/ctpp.201600061</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Monitoring active species in an atmospheric pressure dielectric-barrier discharge: Observation of the Herman-infrared system

Popis výsledku v původním jazyce

An electronic and spectroscopic study of dielectric-barrier discharge transition from the Townsend to the filamentary mode is presented. The discharge is generated under pure nitrogen flow at atmospheric pressure in a reactor with parallel configuration of cylindrical electrodes covered with Al2O3 dielectrics, applying a frequency of 4.85 kHz. The goal of the study was to find optimal conditions for observation of the Herman-infrared (HIR) transition (C ''(5)Pi(+)(u)Sigma(+)(g)) in a perspective to develop and test a ro-vibrational model for this quintet band. We have focused on finding the maximum emissivity of the HIR transition in the homogeneous discharge regime as it offers a more suitable source for calibrating the HIR model. Besides the capability of generating a spatially homogeneous type of radiation, our discharge design also allowed the observation of HIR without detectable interference from the first positive system of nitrogen which is not common for atmospheric pressure discharges. In the study, a time-resolved observation of the NO gamma system, the second positive and the HIR nitrogen systems were performed and their emissivities analysed as a function of the discharge period and power. The optimum for the observation of the HIR system was found at 2.94 W (power density of 6 W/cm(3)), corresponding to the Townsend discharge just before its transition to the filamentary one.

Název v anglickém jazyce

Monitoring active species in an atmospheric pressure dielectric-barrier discharge: Observation of the Herman-infrared system

Popis výsledku anglicky

An electronic and spectroscopic study of dielectric-barrier discharge transition from the Townsend to the filamentary mode is presented. The discharge is generated under pure nitrogen flow at atmospheric pressure in a reactor with parallel configuration of cylindrical electrodes covered with Al2O3 dielectrics, applying a frequency of 4.85 kHz. The goal of the study was to find optimal conditions for observation of the Herman-infrared (HIR) transition (C ''(5)Pi(+)(u)Sigma(+)(g)) in a perspective to develop and test a ro-vibrational model for this quintet band. We have focused on finding the maximum emissivity of the HIR transition in the homogeneous discharge regime as it offers a more suitable source for calibrating the HIR model. Besides the capability of generating a spatially homogeneous type of radiation, our discharge design also allowed the observation of HIR without detectable interference from the first positive system of nitrogen which is not common for atmospheric pressure discharges. In the study, a time-resolved observation of the NO gamma system, the second positive and the HIR nitrogen systems were performed and their emissivities analysed as a function of the discharge period and power. The optimum for the observation of the HIR system was found at 2.94 W (power density of 6 W/cm(3)), corresponding to the Townsend discharge just before its transition to the filamentary one.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Contributions to Plasma Physics

ISSN

0863-1042

e-ISSN

—

Svazek periodika

57

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

67-75

Kód UT WoS článku

000398735300004

EID výsledku v databázi Scopus

2-s2.0-85013288091