26 January 1994 High-resolution infrared difference frequency laser spectroscopic characterization of methane discharge plasmas
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Proceedings Volume 2205, 11th Symposium and School on High-Resolution Molecular Spectroscopy; (1994) https://doi.org/10.1117/12.166207
Event: High Resolution Molecular Spectroscopy: 11th Symposium and School, 1993, Moscow, Russian Federation
Abstract
Using an original double modulation set-up of an IR difference frequency laser spectrometer and a hollow cathode discharge cell with methane, in addition to a double phase sensitive detection method, it has been possible to distinguish between (nu) 3 band spectral lines of the CH3 radical and the much stronger lines belonging to the C-H stretching bands of the precursor and other stable species (C2H4, C2H6) that appear in the discharge. The method has proved to be very sensitive to detect population variations versus temperature of very weak transitions from highly excited levels of CH4 and other stable species. The temperature characterization of several neutral species involved in the hollow cathode discharge has been tested and remarkably low temperatures have been obtained.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dionisio Bermejo, Dionisio Bermejo, P. Cancio, P. Cancio, Concepcion Maroto Domingo, Concepcion Maroto Domingo, Rafael Torres Escribano, Rafael Torres Escribano, Juan Miguel Santos Santos, Juan Miguel Santos Santos, M. M. Sanz, M. M. Sanz, Isabel Tanarro, Isabel Tanarro, } "High-resolution infrared difference frequency laser spectroscopic characterization of methane discharge plasmas", Proc. SPIE 2205, 11th Symposium and School on High-Resolution Molecular Spectroscopy, (26 January 1994); doi: 10.1117/12.166207; https://doi.org/10.1117/12.166207
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