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A prototype of an electric-discharge gas flow oxygen−iodine laser: I. Modeling of the processes of singlet oxygen generation in a transverse cryogenic slab RF discharge

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Abstract

The existing kinetic model describing self-sustained and electroionization discharges in mixtures enriched with singlet oxygen has been modified to calculate the characteristics of a flow RF discharge in molecular oxygen and its mixtures with helium. The simulations were performed in the gas plug-flow approximation, i.e., the evolution of the plasma components during their motion along the channel was represented as their evolution in time. The calculations were carried out for the O2: He = 1: 0, 1: 1, 1: 2, and 1: 3 mixtures at an oxygen partial pressure of 7.5 Torr. It is shown that, under these conditions, volumetric gas heating in a discharge in pure molecular oxygen prevails over gas cooling via heat conduction even at an electrode temperature as low as ~100 K. When molecular oxygen is diluted with helium, the behavior of the gas temperature changes substantially: heat removal begins to prevail over volumetric gas heating, and the gas temperature at the outlet of the discharge zone drops to ~220–230 K at room gas temperature at the inlet, which is very important in the context of achieving the generation threshold in an electric-discharge oxygen−iodine laser based on a slab cryogenic RF discharge.

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Authors and Affiliations

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

    N. P. Vagin, A. A. Ionin, I. V. Kochetov, A. P. Napartovich, D. V. Sinitsyn & N. N. Yuryshev

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

    I. V. Kochetov & A. P. Napartovich

Authors
  1. N. P. Vagin
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  2. A. A. Ionin
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  3. I. V. Kochetov
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  4. A. P. Napartovich
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  5. D. V. Sinitsyn
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  6. N. N. Yuryshev
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Correspondence to A. A. Ionin.

Additional information

Original Russian Text © N.P. Vagin, A.A. Ionin, I.V. Kochetov, A.P. Napartovich, D.V. Sinitsyn, N.N. Yuryshev, 2017, published in Fizika Plazmy, 2017, Vol. 43, No. 3, pp. 267–276.

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Vagin, N.P., Ionin, A.A., Kochetov, I.V. et al. A prototype of an electric-discharge gas flow oxygen−iodine laser: I. Modeling of the processes of singlet oxygen generation in a transverse cryogenic slab RF discharge. Plasma Phys. Rep. 43, 330–339 (2017). https://doi.org/10.1134/S1063780X17030151

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  • DOI: https://doi.org/10.1134/S1063780X17030151

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