Cavity-enhanced spectroscopies for applications of remote sensing, chemical kinetics and detection of radical species
Data(s) |
2015
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Resumo |
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 O<sub>2</sub> and CO<sub>2</sub> 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 <sup>13</sup>C/<sup>12</sup>C methane isotope ratios (sigma>0.026%) for the purpose of measuring the temperature dependent kinetic isotope effects of methane oxidation with O(<sup>1</sup>D) 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. |
Formato |
application/pdf |
Identificador |
http://thesis.library.caltech.edu/8978/1/Thesis%20_%20Thinh%20Bui.pdf Bui, Thinh Quoc (2015) Cavity-enhanced spectroscopies for applications of remote sensing, chemical kinetics and detection of radical species. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/Z96D5QXW. http://resolver.caltech.edu/CaltechTHESIS:06032015-151007228 <http://resolver.caltech.edu/CaltechTHESIS:06032015-151007228> |
Relação |
http://resolver.caltech.edu/CaltechTHESIS:06032015-151007228 http://thesis.library.caltech.edu/8978/ |
Tipo |
Thesis NonPeerReviewed |