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Plasma Physics Reports

, Volume 43, Issue 3, pp 330–339 | Cite as

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

  • N. P. Vagin
  • A. A. Ionin
  • I. V. Kochetov
  • A. P. Napartovich
  • D. V. Sinitsyn
  • N. N. Yuryshev
Laser Plasma

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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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • N. P. Vagin
    • 1
  • A. A. Ionin
    • 1
  • I. V. Kochetov
    • 1
    • 2
  • A. P. Napartovich
    • 1
    • 2
  • D. V. Sinitsyn
    • 1
  • N. N. Yuryshev
    • 1
  1. 1.Lebedev Physical InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Troitsk Institute for Innovation and Fusion ResearchTroitsk, MoscowRussia

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