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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Fourier transform spectrometer"”.
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A Fourier transform spectrometer for millimeter and submillimeter wavelengths
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1980.
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Integrated Photonic Spectroscopy: Applying the Digital Fourier-Transform Spectrometer
The digital Fourier-Transform (dFT) spectrometer is a promising on-chip spectrometer architecture that offers exponential scaling for resolution with a compact device footprint. A package of scripted modules employs object-oriented programming to automate creating the mask layout and streamline the …
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Basic and Practical Considerations in Utilizing a Fourier Transform Spectrometer for Spectral Measurements
Made available in DSpace on 2014-12-09T17:36:47Z (GMT). No. of bitstreams: 1 7020979.pdf: 5019518 bytes, checksum: 5c3ff8cd59eda9148117156aa3aad055 (MD5) Previous issue date: 1970
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Infrared Frequency Shifting in Thermally- and Mechanically-Stressed Polymers (Anharmonicity, Nonequilibrium, Ftir, Fourier, Transform, Spectrometer)
Thermal and mechanical stresses alter the spacing of the constituents of a polymer chain, usually resulting in the reduction of the molecular vibration frequency as revealed by the transmission infrared spectroscopy of stressed polymer films. The effect of stress and temperature on infrared …
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Analysis, design and use of a Fourier-transform spectrometer for near infrared glucose absorption measurement
… at 10-15% a year. In this project, a modular Fourier transform spectrometer for the near infrared wavelength region was designed and built. The work was motivated by the need for a versatile and dedicated instrument for research in the area of blood glucose noninvasive measurement. Selection …
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Molecular Spectroscopy: A Study of Molecules in Earth and Planetary Atmospheres
… with the Atmospheric Chemistry Experiment (ACE) Fourier transform spectrometer. These satellite observations have provided a near global picture of N<sub>2</sub>O isotopic fractionation. The relative abundance of the heavier isotopologues increase with altitude and with latitude in the …
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Kinetics and dynamics measured using IntraCavity Laser Absorption Spectroscopy
… a traditional multiple pass absorption cell or Fourier Transform spectrometer. From the fundamental knowledge obtained through these measurements, information about the underlying spectroscopy, dynamics, and kinetics of the species interrogated can be derived. The construction of an ICLA …
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Observation of sulphate aerosols and SO2 from volcanic eruptions using data from the Atmospheric Chemistry Experiment (ACE)
… measured by the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) on board of the SCISAT satellite were used to analyse the temporal and spatial evolution of volcanic aerosols from the Kasatochi (August 2008), Sarychev (June 2009) and Grimsvötn (May 2011) eruptions. …
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High-resolution microwave spectroscopy of several weakly bound complexes.
… nitrosyl (CpNiNO), using pulsed-beam, Fourier transform microwave spectroscopy. The weakly-bound complexes included the two structural isomers of N₂O-HF, the planar bent asymmetric N₂O-HCN complex, the planar bent asymmetric N₂O-HCl complex, and the "stacked" H₂S-SO₂, and H₂S-CO₂ …
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Vibrational Kerr spectroscopy
… of the photoelastic modulators and the Fourier Transform spectrometer impeded the demonstration of the enhancement
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Development and Improvement of Spectroscopic Techniques for Atmospheric Composition Measurements from Ground and Space
… A-band is reported. This instrument, an imaging Fourier Transform Spectrometer (IFTS), is one of the first of its kind to be built. It is a next-generation, atmospheric measurement instrument that can provide high spatial resolution and continuous observations of the Arctic. This thesis will …
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An Investigation of the Distribution of Ozone-depleting Substances in the Upper Troposphere and Lower Stratosphere
… output to the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) profile measurements of CFC-11, CFC-12, HCFC-22, and N2O. In the CMAM30 simulation, the meteorological fields were nudged using the ERA-Interim Reanalysis and a specified tracer was employed for each …
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Instrument Trade Studies for Satellite Remote Sensing of Ammonia
… instruments such as NASA’s Tropospheric Emission Spectrometer and NASA’s Cross-track Infrared Sounder, but these instruments, and others like them, were not designed specifically to measure ammonia. This thesis pursues the development of an optimized instrument to measure ammonia with daily …
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Pulsed molecular beam cavity microwave Fourier transform spectroscopy of some fundamental van der Waals dimers and trimers
… using a pulsed molecular beam cavity microwave Fourier transform spectrometer. Ar-Cl₂ has been found to have a T-shaped geometry dominated by pairwise additive forces, in contrast to the previously studied linear complex Ar-ClF. An effective van der Waals bond distance has been obtained, as well …
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High Resolution Spectra of Carbon Monoxide, Propane and Ammonia for Atmospheric Remote Sensing
… elevated temperatures (from 293-973 K) using a Fourier Transform Spectrometer (FTS). Comparison between the spectra recorded at different temperatures yielded experimental lower state energies. These spectra resulted in the measurement of roughly 30000 lines and about 3000 quantum assignments. …
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Design and Analysis of Quasioptical Components for use in Terahertz Optics and Future CMB Missions
… of PRISITNE’s twelve mirror pFTS (polarising Fourier Transform Spectrometer) was designed using code written by the author to optimise the focusing and collimation of each elliptical surface from criteria outlined in Chapter 3. Chapter 4 deals with the design, manufacturing and analysis of a …
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Trend Analyses of the Abundances of Atmospheric Molecules
… region (2700-3100 cm-1) by high resolution Fourier transform spectroscopy. Isobutane absorption cross sections were determined for six temperatures from 273 K to 723 K. Integrated cross sections were compared with cross section data from the Pacific Northwest National Laboratory (PNNL) …
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