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dc.contributor.supervisor Predoi-Cross, Adriana
dc.contributor.supervisor Teillet, Philippe M.
dc.contributor.author Ibrahim, Amr
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2012-04-24T20:38:23Z
dc.date.available 2012-04-24T20:38:23Z
dc.date.issued 2010
dc.identifier.uri https://hdl.handle.net/10133/2638
dc.description xiv, 134 leaves : ill. ; 29 cm en_US
dc.description.abstract Recently, the high radiance of synchrotron sources was used to enhance FTIR spectrometer performance. However, excessive channel spectra when synchrotron sources are used degrade the quality of retrieved spectral parameters. In the research reported in this thesis, seven different techniques for handling channel spectra were investigated. These techniques were used to reduce channel spectra for a test group of seven samples of CO2 mixed with air recorded using the synchrotron source at the Canadian Light Source. The increases in signal to noise ratio (SNR) of spectra handled with each technique were calculated. SNR results showed that transmission spectra, produced using synthetic background spectra with simulated channel spectra, achieved the highest SNR improvement. However, when the spectra groups were fitted using nonlinear least square fit algorithm, the technique using channel spectra fitting produced the smallest fitting residual. Moreover, the retrieved intensities and air broadening coefficients of 21 spectral lines showed that the spectral fitting technique produced the most accurate values as compared to the HITRAN 2008 database. Although the spectral fitting technique was accurate in retrieving spectral line parameters, applying the technique at wider spectral ranges was less accurate. A modification to the channel spectra fitting technique by performing iterations of channel fitting was introduced to process wider spectral ranges. Carbon dioxide laser band I centred at 961 wavenumber was analyzed using 24 spectra recorded under different experimental conditions. The intensity and air-and self-broadening coefficients were retrieved for 48 spectral lines with average deviations from HITRAN database values of 2.11%, 1.25% and 4.14%, respectively, using the Voigt profile. These average deviations lie within the uncertainty limits listed by the database. The deviation between our results and other results reported in the literature were also examined and it is found to be also within the range of HITRAN uncertainties. The effect of errors in fitting channel spectra parameters was examined and found to be mitigated by the inclusion of channel-free spectra in the multispectral fit. en_US
dc.language.iso en_US en_US
dc.publisher Lethbridge, Alta. : University of Lethbridge, Dept. of Physics and Astronomy, c2010 en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Spectrum analysis en_US
dc.subject Greenhouse gases -- Research en_US
dc.subject Greenhouse effect, Atmospheric -- Research en_US
dc.subject Synchrotons en_US
dc.subject Fourier transform infrared spectroscopy en_US
dc.subject Remote sensing -- Research en_US
dc.subject Carbon dioxide -- Research en_US
dc.subject Canadian Light Source en_US
dc.subject LabVIEW en_US
dc.subject Dissertations, Academic en_US
dc.title Spectroscopic study of channel spectra phenomena in the synchrotron-based FTIR spectrometer at the Canadian Light Source en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Physics and Astronomy en_US
dc.degree.level Masters


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