Nonequilibrium Ionization by Vibrationally Excited Molecules in Supersonic Flows |
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| Authors: | N. A. Fomin A. V. Krauklis L. Rothhardt P. P. Samtsov R. I. Soloukhin |
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| Affiliation: | 1. Heat and Mass Transfer Institute of the BSSR Academy of Sciences, 220728 Minsk, USSR;2. Physikalisch-Technisches Institut der AdW der DDR, Jena, 6900, DDR |
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| Abstract: | The results of experimental investigations on thermal nonequilibrium ionization in CO2: N2: He mixtures are presented. Measurements of electron density, ne, in vibrationally excited nitrogen were made in a supersonic flow with different CO2 contents as well as in a CO2: N2: He = 1 : 5 : 4 mixture laser gas. The mixtures were heated in a shock tube and expanded through a supersonic nozzle. Furthermore, supersonic mixing of N2 and CO2 + He was used in some experiments. The measured values of ne in the plenum chamber and in the supersonic nozzle are reported, and the processes responsible for nonequilibrium ionization in a laser-active medium are discussed. |
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