Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser |
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Authors: | T M Gorbunov A N Soldatov A G Filonov |
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Institution: | 1.Tomsk State University,Tomsk,Russia;2.V. E. Zuev Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences,Tomsk,Russia |
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Abstract: | Results of spectroscopic investigations into plasma of a pulse-periodic strontium vapor laser operating in the superradiance
mode on the infrared transition at λ = 6.45 μm are presented. The method of determining the electron temperature and concentration
as well as the gas temperature – T
e
, n
e
, and T
g
– based on measuring the absolute intensities of some SrI and SrII and buffer gas (helium or neon) spectral lines is used.
Time dependences of the line intensities during a current pulse (τ = 150 ns) and near afterglow (up to 3 μs) are obtained
under conditions of non-equilibrium plasma ionization and recombination. The optical system collects radiation from the entire
length of the plasma column by means of separating radial volume zones, includingthe central zone and the zone closer to the
walls, with the monochromator slit. The results obtained allow us not only to calculate T
e
, n
e
, and T
g
values, but also to trace the spatiotemporal plasma evolution. |
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Keywords: | |
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