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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10191428%21RIV14-MSM-11320___
rdf:type
n15:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.vacuum.2012.04.048
dcterms:description
Nowadays the CO2 lasers are used in many technologies, including medicine and material processing industry. Besides original low-pressure low-power lasers pumped by DC glow discharge, the attention is focused on the high power atmospheric pressure lasers. We use optical emission spectroscopy to study both low pressure (from 266 Pa to 1330 Pa) DC glow discharge (DC GD) and the dielectric barrier discharge (DBD) (from 5 kPa to 100 kPa) in mixtures of helium, nitrogen and carbon dioxide used in CO2 lasers. Considering the emission spectrum of the discharges mentioned above, we can find bands of the first and the second positive systems of the nitrogen molecule. From these bands it is possible to deduce energetic balance and the vibrational temperature [1]. In our contribution, the vibrational temperature of nitrogen is determined by means of optical emission spectroscopy from the second positive system band of the nitrogen molecule for various discharge currents in DC glow discharge and for various gap widths in DBD. Using these two discharges we covered the whole pressure range from 266 Pa up to atmospheric pressure. The dependence of the vibrational temperature on N-2 content in the mixture is also investigated. The vibrational temperature showed a steady decrease with increasing pressure in whole pressure range. It was found, that the vibrational temperature of nitrogen in the DC GD is twice as high as in the DBD, which was attributed to the different nature of discharges. Spectroscopic measurements were complemented with measurements of electric properties of discharges: the longitudinal electric field strength for DC glow discharge and Lissajous' figures for DBD [1,2]. Nowadays the CO2 lasers are used in many technologies, including medicine and material processing industry. Besides original low-pressure low-power lasers pumped by DC glow discharge, the attention is focused on the high power atmospheric pressure lasers. We use optical emission spectroscopy to study both low pressure (from 266 Pa to 1330 Pa) DC glow discharge (DC GD) and the dielectric barrier discharge (DBD) (from 5 kPa to 100 kPa) in mixtures of helium, nitrogen and carbon dioxide used in CO2 lasers. Considering the emission spectrum of the discharges mentioned above, we can find bands of the first and the second positive systems of the nitrogen molecule. From these bands it is possible to deduce energetic balance and the vibrational temperature [1]. In our contribution, the vibrational temperature of nitrogen is determined by means of optical emission spectroscopy from the second positive system band of the nitrogen molecule for various discharge currents in DC glow discharge and for various gap widths in DBD. Using these two discharges we covered the whole pressure range from 266 Pa up to atmospheric pressure. The dependence of the vibrational temperature on N-2 content in the mixture is also investigated. The vibrational temperature showed a steady decrease with increasing pressure in whole pressure range. It was found, that the vibrational temperature of nitrogen in the DC GD is twice as high as in the DBD, which was attributed to the different nature of discharges. Spectroscopic measurements were complemented with measurements of electric properties of discharges: the longitudinal electric field strength for DC glow discharge and Lissajous' figures for DBD [1,2].
dcterms:title
Comparison of low-pressure DC glow discharge and dielectric barrier discharge in CO2-laser mixture by optical emission spectroscopy Comparison of low-pressure DC glow discharge and dielectric barrier discharge in CO2-laser mixture by optical emission spectroscopy
skos:prefLabel
Comparison of low-pressure DC glow discharge and dielectric barrier discharge in CO2-laser mixture by optical emission spectroscopy Comparison of low-pressure DC glow discharge and dielectric barrier discharge in CO2-laser mixture by optical emission spectroscopy
skos:notation
RIV/00216208:11320/13:10191428!RIV14-MSM-11320___
n15:predkladatel
n21:orjk%3A11320
n3:aktivita
n13:Z n13:I n13:S
n3:aktivity
I, S, Z(MSM0021620834)
n3:cisloPeriodika
duben
n3:dodaniDat
n20:2014
n3:domaciTvurceVysledku
n8:8383448 n8:9819118 n8:9599290 n8:8717818
n3:druhVysledku
n18:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
66236
n3:idVysledku
RIV/00216208:11320/13:10191428
n3:jazykVysledku
n17:eng
n3:klicovaSlova
Optical emission spectroscopy; Vibrational temperature; Dielectric barrier discharge; DC glow discharge; CO2-laser mixture
n3:klicoveSlovo
n4:Vibrational%20temperature n4:Optical%20emission%20spectroscopy n4:CO2-laser%20mixture n4:Dielectric%20barrier%20discharge n4:DC%20glow%20discharge
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[E44149A4017F]
n3:nazevZdroje
Vacuum
n3:obor
n5:BL
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
6
n3:rokUplatneniVysledku
n20:2013
n3:svazekPeriodika
90
n3:tvurceVysledku
Morávek, Matěj Jan Kaňka, Adolf Schmiedt, Lukáš Nikiforov, Anton Hrachová, Věra Leys, Christophe
n3:wos
000313089800023
n3:zamer
n11:MSM0021620834
s:issn
0042-207X
s:numberOfPages
6
n14:doi
10.1016/j.vacuum.2012.04.048
n16:organizacniJednotka
11320