Long Plasma Jet Generated by DC Discharge in N2 at Atmospheric Pressure: Impact of Trace Admixtures on Composition of Reactive Species in Far Afterglow

The object under study is a long plasma jet (up to 15 cm) generated by a steady-state dc discharge in N 2 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 o...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2015-01, Vol.43 (3), p.745-752
Main Authors: Akishev, Yuri, Balakirev, Anton, Grushin, Michail, Karalnik, Vladimir, Kochetov, Igor, Napartovich, Anatoly, Petryakov, Alexander, Trushkin, Nikolay
Format: Article
Language:English
Subjects:
Atmospheric pressure plasma jet (APPJ)
Discharges (electric)
distant plasma treatment
far afterglow
Fault location
Nitrogen
Plasma sources
reactive plasma species
Surface treatment
trace admixtures
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Summary:The object under study is a long plasma jet (up to 15 cm) generated by a steady-state dc discharge in N 2 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 N 2 tank. It is shown that small oxygen admixtures (at 10 ppm level) to N 2 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.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2014.2383618