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
| Autor: | Igor' V Kochetov, Andrey A. Ionin, Nikolai P Vagin, D. V. Sinitsyn, A. P. Napartovich, Nikolai N Yuryshev |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) chemistry.chemical_element Thermodynamics 02 engineering and technology Plasma Partial pressure Cryogenics 021001 nanoscience & nanotechnology Condensed Matter Physics Thermal conduction 01 natural sciences Oxygen chemistry 0103 physical sciences Heat transfer Electric discharge Atomic physics 0210 nano-technology Helium |
| Zdroj: | Plasma Physics Reports. 43:330-339 |
| ISSN: | 1562-6938 1063-780X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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