NDLI: The Influence of Small Hydrogen Admixtures up to 5 % to a Low Pressure Nonuniform Microwave Discharge in Nitrogen

Content Provider	Springer Nature Link
Author	Jovović, J. Epstein, I. L. Konjević, N. Lebedev, Yu A. Šišović, N. M. Tatariv, A. V.
Copyright Year	2012
Abstract	We present the results of spectroscopic and 2D modeling study of the influence of hydrogen addition to non-uniform nitrogen plasma of electrode microwave discharge. The axial intensity distributions of the H$_{α}$ line and N$_{2}$ (2$^{+}$: C$^{3}$Π$_{u}$ → B$^{3}$Π$_{g}$, 1$^{+}$: B$^{3}$Π$_{g}$ → A$^{3}$Σ u + ) and N$_{2}$ $^{+}$ (1$^{−}$: B$^{2}$Σ u + → X$^{2}$Σ g + ) molecular bands are recorded for different incident microwave power input and hydrogen content. The corona model is used to determine electric field strength in nitrogen discharge from the intensity ratio of 2$^{+}$ and 1$^{−}$ system of nitrogen bands. By means of 2D modeling spatial distributions of nitrogen molecules in C$^{3}$Π$_{u}$ state, microwave field strength, electron density, concentrations of N$_{2}$ $^{+}$, N$_{4}$ $^{+}$ are determined in nitrogen and in nitrogen–hydrogen mixtures. The concentration of N$_{2}$H$^{+}$ ions in nitrogen–hydrogen mixtures is determined also. The general conclusion of 2D modeling is in agreement with experimental results and shows that the influence of hydrogen addition to discharge is related to the fast conversion reactions of nitrogen ions (N$_{2}$ $^{+}$, N$_{4}$ $^{+}$) to N$_{2}$H$^{+}$ ion. These ion conversions lead to the change of ion plasma components transport properties, to the modification of microwave field strength in plasma, and consequently, to the alternation of all plasma parameters.
Starting Page	1093
Ending Page	1108
Page Count	16
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	32
Issue Number	5
e-ISSN	15728986
Language	English
Publisher	Springer US
Publisher Date	2012-07-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Non-uniform microwave nitrogen discharge Hydrogen admixture Optical emission spectroscopy Nitrogen molecular ions Self-consistent 2D modeling Nuclear Physics, Heavy Ions, Hadrons Mechanical Engineering Characterization and Evaluation of Materials Mechanics Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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