Abstract
A parametric study of the electron energy distribution function (EEDF) and the electron mobility in the mixture Na + Ar + N2 is carried out. An analysis is made of the conditions that obtain in a photoplasma when the detachment of the mean electron energy from the neutral gas temperature is due to superelastic collisions (collisions of the second kind) with excited sodium atoms. The case of low ionization of the medium at low vibrational temperatures of the ground state of the nitrogen molecules is considered. To find the EEDF a numerical solution of the Boltzmann transport equation is carried out. It is found that in the indicated mixture the presence of nitrogen leads to a depletion of the EEDF in the region of efficient vibrational excitation of the molecules and promotes the formation of inversion in the EEDF ∂f(ɛ)/∂ɛ>0 in the energy range corresponding to the Ramsauer minimum in the cross section of elastic collisions of electrons with the argon atoms. It is shown that the nonequilibrium character of the EEDF leads to a complicated dependence of the electron mobility on the partial ratios of the components of the mixture, the degree of ionization of the medium, and the population of the resonantly excited sodium atoms.
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Zh. Tekh. Fiz. 69, 14–19 (April 1999)
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Gorbunov, N.A., Mel’nikov, A.S. Effect of molecular nitrogen on the electron mobility in a mixture of argon and optically excited sodium vapor. Tech. Phys. 44, 361–366 (1999). https://doi.org/10.1134/1.1259302
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DOI: https://doi.org/10.1134/1.1259302