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Local Plasma Parameters, Atom Concentrations, and Absolute Luminescence Intensities in the Discharge Supported by a Hollow Cathode

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Abstract

Local measurements of the parameters of the electronic component, the space potential, and the absolute luminosities of the nonequilibrium discharge plasma in wet low-pressure helium supported by the hollow cathode are performed. The concentrations of helium and hydrogen atoms in the ground states are determined from the intensities of the transition lines between the excited levels using the coronal model (CM), which takes into account the branching of electronic transitions from the excitation levels of atoms and the final optical density of the plasma. It is shown that the proposed refinement of the CM under these conditions makes it possible to select a number of spectral lines that allow one to determine the concentrations of helium atoms in the ground state by measuring the absolute intensities of electronic transition radiations. The possibility of using correlations of the calculated temperature of electrons with the effective temperatures of population and distribution of excited atoms is considered.

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ACKNOWLEDGMENTS

The authors are grateful to N.A. Dyatko and V.V. Lagunov for their assistance in conducting the experiments and for taking part in the discussion of the results.

Funding

This study was supported by the Russian Science Foundation within project no. 19-12-00310.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    S. N. Andreev, A. V. Bernatskiy, I. I. Draganov, I. V. Kochetov & V. N. Ochkin

  2. Moscow Institute of Physics and Technology (National Research University), 141700, Dolgoprudny, Moscow oblast, Russia

    I. I. Draganov

  3. Troitsk Institute for Innovation and Fusion Research, 142190, Moscow, Russia

    I. V. Kochetov

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  1. S. N. Andreev
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  2. A. V. Bernatskiy
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  3. I. I. Draganov
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  5. V. N. Ochkin
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Correspondence to A. V. Bernatskiy, I. V. Kochetov or V. N. Ochkin.

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Translated by O. Kadkin

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Andreev, S.N., Bernatskiy, A.V., Draganov, I.I. et al. Local Plasma Parameters, Atom Concentrations, and Absolute Luminescence Intensities in the Discharge Supported by a Hollow Cathode. Plasma Phys. Rep. 48, 1273–1287 (2022). https://doi.org/10.1134/S1063780X22601043

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