Investigation of the glow and contracted discharge plasmas in nitrogen by coherent anti-Stokes Raman spectroscopy,optical interferometry,and numerical simulation |
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Authors: | V A Shakhatov O A Gordeev |
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Institution: | (1) Topchiev Institute of Petrohemical Synthesis, Russian Academy of Sciences, Leninskii pr. 29, Moscow, 119991, Russia;(2) Moscow State Institute of Aviation, Volokolamskoe sh. 4, Moscow, 125993, Russia |
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Abstract: | The translational temperature in the plasma of glow and contracted discharges is measured using the methods of coherent anti-Stokes
Raman spectroscopy and optical interferometry. The current density in the discharge is determined by measuring the electron
concentration with optical interferometry and emission spectroscopy. The distribution of nitrogen molecules over vibrational
and rotational levels in the ground state, the electron energy distribution, and the time dependence of the gas temperature
are numerically found based on a model including the homogeneous Boltzmann equation and balance equations for the concentrations
of charged and excited particles and for the gas temperature. The dynamics of transition to the quasi-steady-state distribution
of nitrogen molecules over vibrational levels is studied. |
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Keywords: | |
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