Author : Thinh Quoc Bui
Release : 2015
Genre : Electronic dissertations
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Cavity-enhanced Spectroscopies for Applications of Remote Sensing, Chemical Kinetics and Detection of Radical Species by : Thinh Quoc Bui
Download or read book Cavity-enhanced Spectroscopies for Applications of Remote Sensing, Chemical Kinetics and Detection of Radical Species written by Thinh Quoc Bui. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes applications of cavity enhanced spectroscopy towards applications of remote sensing, chemical kinetics and detection of transient radical molecular species. Both direct absorption spectroscopy and cavity ring-down spectroscopy are used in this work. Frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) was utilized for measurements of spectral lineshapes of O2 and CO2 for obtaining laboratory reference data in support of NASA's OCO-2 mission. FS-CRDS is highly sensitive (>10 km absorption path length) and precise (>10000:1 SNR), making it ideal to study subtle non-Voigt lineshape effects. In addition, these advantages of FS-CRDS were further extended for measuring kinetic isotope effects: A dual-wavelength variation of FS-CRDS was used for measuring precise D/H and 13C/12C methane isotope ratios (sigma>0.026%) for the purpose of measuring the temperature dependent kinetic isotope effects of methane oxidation with O(1D) and OH radicals. Finally, direct absorption spectroscopic detection of the trans-DOCO radical via a frequency combs spectrometer was conducted in collaboration with professor Jun Ye at JILA/University of Colorado.
