Abstract
An experimental study has been made of the characteristics of radiation from a dispersing helium plasma. From measurements of the space-time dependence of the line intensities of the helium 23P — n3D series we obtained the distribution of the populations of the n3D levels for n=3−10. The study has shown that over a wide range of conditions the high-lying levels (n=5−10) are in equilibrium with electrons while a substantial deviation from equilibrium is observed for levels n=3, 4. From the energy distribution of the populations of the upper levels we determined the space-time dependence of the electron temperature, which reflects the process of effective electron cooling during dispersal of the plasma. The gas temperature was estimated from the populations of helium singlet and triplet levels with n=5. The time distribution of the electron density in the plasma was found from the Stark broadening of the spectral lines.
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Deceased.
V. D. Kuznetsov Siberian Physicotechnical Institute, Tomsk State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 15–19, November, 1992.
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Murav'ev, I.I., Chernikova, E.V., Shatova, A.D. et al. Optical diagnostics of dispersing He plasma. Russ Phys J 35, 1008–1011 (1992). https://doi.org/10.1007/BF00559094
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DOI: https://doi.org/10.1007/BF00559094