NDLI: Characterization of the Active Species in the Afterglow of a Nitrogen and Helium Atmospheric-Pressure Plasma

Content Provider	Springer Nature Link
Author	Babayan, S.E. Ding, G. wling, G.R. Yang, X. Hicks, R.F.
Copyright Year	2002
Abstract	The concentrations of the neutral active species in the afterglow of a nitrogen and helium atmospheric-pressure plasma have been determined by optical emission and absorption spectroscopy and by numerical modeling. For operation with 10 Torr N$_{2}$ and 750 Torr He, at 15.5 W/cm$^{3}$ rf power, 30.4 L/min flow rate, and a neutral temperature of 50°C, the plasma produced 4.8×10$^{15}$ cm$^{−3}$ of ground state nitrogen atoms, N($^{4}$S), 2.1×10$^{13}$ cm$^{−3}$ of N$_{2}$(A$^{3}$Σ$_{u}$), 1.2×10$^{12}$ cm$^{−3}$ of N$_{2}$(B$^{3}$Π$_{g}$), and 3.2×10$^{9}$ cm$^{−3}$ of N$_{2}$(C$^{3}$Π$_{u}$). The concentration of nitrogen atoms and metastable state nitrogen molecules, N$_{2}$(A), increased gradually with the rf power and the nitrogen partial pressure. Both the model and experiments indicate that ground-state nitrogen atoms are the dominant active species in the afterglow beyond 2.0 ms.
Starting Page	255
Ending Page	269
Page Count	15
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	22
Issue Number	2
e-ISSN	15728986
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Characterization and Evaluation Materials Mechanics Nuclear Physics, Heavy Ions, Hadrons Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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