Zhurnal Prikladnoii Spektroskopii
Žurnal prikladnoj spektroskopii

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Spectroscopic Measurement of Electron Concentration in Shock-Heated Gas

P. V. Kozlov, I. E. Zabelinskii, N. G. Bykova, G. Ya. Gerasimov, V. Yu. Levashov

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Abstract

The results of spectroscopic measurements of the equilibrium electron concentration behind a strong shock wave in argon at a shock velocity of 4.2 km/s and a pressure ahead of the wave front of 5 Torr are presented. Similar measurements are carried out in oxygen, nitrogen and air in the velocity range from 8.3 to 11.3 km/s at an initial pressure of 0.25 Torr. The measurement method is based on the analysis of the broadening of the line of the hydrogen atom H_β of the Balmer series in the spectrum of the integral radiation density of the gas under study, to which a small amount of hydrogen is added (about 1%). The dependence of the electron concentration on the shock wave velocity in oxygen, nitrogen and air has been established. The results obtained are compared with the available experimental and calculated data.

Keywords

shock wave, radiation spectrum, broadening of spectral lines, electron concentration

About the Authors

P. V. Kozlov

Institute of Mechanics of Lomonosov Moscow State University
Russian Federation

Moscow

I. E. Zabelinskii

Institute of Mechanics of Lomonosov Moscow State University
Russian Federation

Moscow

N. G. Bykova

Institute of Mechanics of Lomonosov Moscow State University
Russian Federation

Moscow

G. Ya. Gerasimov

Institute of Mechanics of Lomonosov Moscow State University
Russian Federation

Moscow

V. Yu. Levashov

Institute of Mechanics of Lomonosov Moscow State University
Russian Federation

Moscow

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Review

For citations:

Kozlov P.V., Zabelinskii I.E., Bykova N.G., Gerasimov G.Ya., Levashov V.Yu. Spectroscopic Measurement of Electron Concentration in Shock-Heated Gas. Zhurnal Prikladnoii Spektroskopii. 2024;91(4):540-545. (In Russ.)

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ISSN 0514-7506 (Print)