Microwave electrode discharge in nitrogen: Structure and characteristics of the electrode region
- Russian Academy of Sciences, Topchiev Institute of Petrochemical Synthesis (Russian Federation)
The parameters of the electrode region of an electrode microwave discharge in nitrogen are studied by emission spectroscopy. The radial and axial distributions of the intensities of the bands of the second (N{sub 2}(C{sup 3{Pi}}{sub u} {sup {yields}}B{sup 3{Pi}}{sub g})) and first (N{sub 2}(B{sup 3{Pi}}{sub g} {sup {yields}}A{sup 3{Sigma}}{sub u}{sup +})) positive systems of molecular nitrogen and the first negative system of nitrogen ions (N{sub 2}{sup +} (B{sup 2{Sigma}}{sub u}{sup +} {sup {yields}}X{sup 2{Sigma}}{sub g}{sup +})), the radial profiles of the electric field E and the electron density N{sub e}, and the absolute populations of the vibrational levels v{sub C} = 0-4 of the C{sup 3{Pi}}{sub u} excited state of N{sub 2} and the vibrational level v{sub Bi} = 0 of the B{sup 2{Sigma}}{sub u}{sup +} excited state of a molecular nitrogen ion are determined. The population temperature of the first vibrational level T{sub V} of the ground electronic state X{sup 1{Sigma}}{sub g}{sup +} of N{sub 2} and the excitation temperature T{sub C} of the C{sup 3{Pi}}{sub u} state in the electrode region of the discharge are measured. The radius of the spherical region and the spatially integrated plasma emission spectra are studied as functions of the incident microwave power and gas pressure. A method for determining the electron density and the microwave field strength from the plasma emission characteristics is described in detail.
- OSTI ID:
- 21400003
- Journal Information:
- Plasma Physics Reports, Vol. 34, Issue 7; Other Information: DOI: 10.1134/S1063780X08070052; Copyright (c) 2008 Pleiades Publishing, Ltd.; ISSN 1063-780X
- Country of Publication:
- United States
- Language:
- English
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ELECTRIC FIELDS
ELECTRODES
ELECTRON DENSITY
EMISSION
EMISSION SPECTRA
EMISSION SPECTROSCOPY
EXCITED STATES
HIGH-FREQUENCY DISCHARGES
MICROWAVE RADIATION
NITROGEN
PLASMA
ELECTRIC DISCHARGES
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
NONMETALS
RADIATIONS
SPECTRA
SPECTROSCOPY