NDLI: The coupling between electrons and highly vibrationally excited molecules in optically pumped plasmas

Content Provider	IEEE Xplore Digital Library
Author	Plonjes, E. Adamovich, I.V. Subramanian, V.V. Rich, J.W.
Copyright Year	1998
Description	Author affiliation: Dept. of Mech. Eng., Ohio State Univ., Columbus, OH, USA (Plonjes, E.)
Abstract	Summary form only given. The paper addresses ionization in collisions of highly excited carbon monoxide molecules (v=25-40), as well as energy transfer from the vibrational mode of CO to free electrons. Carbon monoxide in a CO-Ar-He mixture is vibrationally excited by resonance absorption of the CO laser radiation in an optical absorption cell. The pressure in the cell is P=100 Torr. The laser has a total power output of 10 W, with about 0.25 W on a 1/spl rarr/0 band and is repetitively pulsed, which allows studying time-dependent excitation. Only the low vibrational levels of CO (v<12) are populated by a laser. The high vibrational levels (up to v=40) are populated by vibration-vibration (V-V) pumping. Time-dependent first overtone CO infrared spectra are taken by a step-scan Fourier transform infrared spectrometer (FTIR), with the time resolution of 50 /spl mu/sec and spectral resolution of 0.25 cm/sup -1/. From these spectra both rotational temperature of the mixture (T=400-700 K) and time-dependent absolute populations of individual vibrational levels of CO are inferred.
File Size	135143
File Format	PDF
ISBN	0780347927
ISSN	07309244
DOI	10.1109/PLASMA.1998.677657
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laser excitation Free electron lasers Infrared spectra Absorption Laser modes Ionization Energy exchange Resonance Electron optics Optical pumping
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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