DocumentCode
19029
Title
Long Plasma Jet Generated by DC Discharge in N2 at Atmospheric Pressure: Impact of Trace Admixtures on Composition of Reactive Species in Far Afterglow
Author
Akishev, Yuri ; Balakirev, Anton ; Grushin, Michail ; Karalnik, Vladimir ; Kochetov, Igor ; Napartovich, Anatoly ; Petryakov, Alexander ; Trushkin, Nikolay
Author_Institution
State Res. Centre of Russian Federation, Troitsk Inst. of Innovations & Fusion Res., Troitsk, Russia
Volume
43
Issue
3
fYear
2015
fDate
Mar-15
Firstpage
745
Lastpage
752
Abstract
The object under study is a long plasma jet (up to 15 cm) generated by a steady-state dc discharge in N2 at atmospheric pressure. Successful usage of long afterglow plasma jet for distant treatment of 3-D object of a complicated shape with deep slots was demonstrated. This paper focuses on a role of trace impurities in plasma-forming gas on chemical composition of reactive species in far afterglow plasma. This role was studied numerically by example of the additives in high-purity nitrogen contained in high-pressure N2 tank. It is shown that small oxygen admixtures (at 10 ppm level) to N2 can be more effective in production of atomic oxygen than ambient air. Besides, trace admixtures of water vapor and hydrocarbons (at parts per million level) lead to full change in a composition of reactive species in far afterglow in comparison with the set of primary species generated by plasma source.
Keywords
afterglows; numerical analysis; organic compounds; plasma chemistry; plasma impurities; plasma jets; plasma sources; water; 3D object; H2O; N2; atmospheric pressure afterglow plasma jet; atomic oxygen admixtures; atomic oxygen production; chemical composition; high-pressure nitrogen tank; high-purity nitrogen tank; hydrocarbons; numerical analysis; plasma impurities; plasma source; plasma-forming gas; pressure 1 atm; reactive species; size 15 cm; steady-state DC discharge; water vapor; Discharges (electric); Fault location; Nitrogen; Plasma sources; Surface treatment; Atmospheric pressure plasma jet (APPJ); distant plasma treatment; far afterglow; reactive plasma species; trace admixtures; trace admixtures.;
fLanguage
English
Journal_Title
Plasma Science, IEEE Transactions on
Publisher
ieee
ISSN
0093-3813
Type
jour
DOI
10.1109/TPS.2014.2383618
Filename
7010052
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