Intracavity laser spectroscopy of molecules in low-temperature plasma

Leonid N. Sinitsa; T. M. Petrova; V. I. Serdukov; Yu. A. Poplavskii; Vladimir M. Klimkin

doi:10.1117/12.459398

19 March 2002 Intracavity laser spectroscopy of molecules in low-temperature plasma

Leonid N. Sinitsa, T. M. Petrova, V. I. Serdukov, Yu. A. Poplavskii, Vladimir M. Klimkin

Proceedings Volume 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures; (2002) https://doi.org/10.1117/12.459398
Event: Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, 2002, Moscow, Russian Federation

Abstract

The investigations into the Intracavity laser spectroscopy of excited molecules in low temperature plasma performed at the Institute of Atmospheric Optics SB RAS are presented. Small size of the absorption layer allowed different ways of the molecule excitation: in electrical discharge, in plasma of laser spark. Investigation were performed using ICL-spectrometers in the visible and near IR regions with spectral resolution of 0.02 cm-1 and threshold absorption sensitivity of 10-8 cm-1 that corresponds to use 10000 m absorption path in classical spectrometry. The intracavity laser spectrometer with an additional channel for recording emission spectra is presented. The spectrometer is capable of recording weak absorption spectra of stable molecules and radicals in plasma with high threshold sensitivity, as well as monitoring the molecular composition of a gas using visible and UV emission spectra with temporal resolution of 25ns. Absorption spectra of CO2 and C2 were recorded in plasma. New vibration-rotation bands induced by transitions to highly excited states are assigned; spectroscopic constants of upper states were determined.

Citation Download Citation

Leonid N. Sinitsa, T. M. Petrova, V. I. Serdukov, Yu. A. Poplavskii, and Vladimir M. Klimkin "Intracavity laser spectroscopy of molecules in low-temperature plasma", Proc. SPIE 4460, Selected Research Papers on Spectroscopy of Nonequilibrium Plasma at Elevated Pressures, (19 March 2002); https://doi.org/10.1117/12.459398

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