Vol. 6, issue 03, article # 4
pdf Demkin V. P., Mel'nichuk S. V., Murav'ev I. I. Polarization diagnostics of helium plasma radiation in an electric gas discharge of the beam type. // Atmospheric and oceanic optics. 1993. V. 6. No. 03. P. 253-258.Copy the reference to clipboard
Abstract:
This paper presents some results of theoretical and experimental studies of the electrostatic field influence on the radiation and collision processes in a gas discharge plasma. Formulas derived for describing angular and polarization characteristics of radiation of atoms due to dipole transition from Stark state are presented. Formula for cross section of the atomic excitation by electrons is derived and some regularities in the electric field influence on the amplitude of inelastic scattering are revealed. Using formalism of polarization tensors the formulas are derived for the degree of linear polarization of plazma emission in the electric field at the anisotropic pump by an electron beam. The obtained formulas made a basis for a technique for determining the electric field strength and populations of Stark states of atoms.
Experimental results on measuring the degree of linear polarization of the helium plasma emission in a gas discharge of the beam type have shown a good qualitative agreement with the results of theoretical calculations.