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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 194 for “"Spectrometers"”.
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Advanced adaptive library for gamma-ray spectrometers
Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-04-28T16:46:46Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Kong_Xianliang.docx: 3637946 bytes, checksum: c93870ae591371661924d085ce6541db (MD5) Kong_Xianliang.pdf: 9861947 …
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On-chip spectrometers with photonic integrated circuits
The miniaturization of optical spectrometers, one of the most essential characterization tools for analyzing light and extracting material information, has long been a primary research focus in both academia and industry. In recent years, this trend is further accelerated by the rapidly growing …
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Neutron spectra measurements with miniature NE-123 spectrometers
Digitized by Kansas Correctional Industries
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Automated isotope identification algorithms for low-resolution gamma spectrometers
Handheld radio-isotope identifiers (RIIDs) are widely deployed for nuclear security applications, but these detectors generally have poor isotope identification performance. Most of these deployed detectors use low-resolution NaI scintillators due to their low cost and good efficiency. Alternative …
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Design of multi-channel spectrometers for scanning ion/electron microscopes
The potential advantages of multi-channel analysers over conventional sequential detection are well known and are active areas of research both for electron energy spectroscopy and ion mass spectroscopy. Their inherent advantage of capturing the entire spectrum in parallel, promises at least an …
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Investigating the low-frequency stability of BiSON's resonant scattering spectrometers
… Oscillations Network (BiSON) Resonant Scattering Spectrometers (RSS). To that end we present a novel model of the RSS and its observations that allows for the determination of a significant improvement in calibration for ground-based Sun-as-a-star Doppler velocity observations. We show that the …
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A Microprocessor-Controlled Photodiode Array Measurement System for Analytical Spectrometers
Made available in DSpace on 2014-12-13T20:10:16Z (GMT). No. of bitstreams: 1 7804077.pdf: 16547288 bytes, checksum: 2ffa66ff6110c523efed511eefa9e432 (MD5) Previous issue date: 1977
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Emission tomography through advanced 3-D position-sensitive CZT spectrometers
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Miniature, high-speed imaging transform spectrometers and advanced sampling algorithms
… of miniature imaging Fourier transform spectrometers and irregular sampling techniques. An imaging spectrometer is a device that takes a series of images that include information from a variety of wavelengths of light at high spectral resolutions. When this device is combined with …
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Quantifying Stratospheric Chlorine Chemistry by the Satellite Spectrometers GOME and SCIAMACHY
… In this thesis, measurements of the satellite spectrometers GOME and SCIAMACHY were evaluated for the atmospheric trace gas chlorine dioxide (OClO) and analysed with respect to their relevance for the polar stratospheric ozone chemistry. OClO is an important indicator for stratospheric chlorine …
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Metrology and mechanics for manufacturing space-based x-ray grating spectrometers
Small errors in critical dimensions (CDs) or deformation of optical components can lead to severe performance degradation in high-resolution imaging and spectroscopy tools. Consistent innovations towards more precise optical elements and assembly procedures have led to high-resolution optical …
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Neutron Response Vectorization and Optimization of Moderating Neutron Spectrometers for Active Interrogation
… to multi-detector moderating neutron spectrometers in order to exploit all of these SNM signature parameters: time, energy, and space. The two new methods are: 1) an energy-specific optimization method for application driven spectrometer design via virtual detector simulations and …
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Charged Particle Optics Simulations and Optimizations for Miniature Mass and Energy Spectrometers
<p>Computer simulation and modeling is a powerful tool for the analysis of physical systems; in this work we consider the use of computer modeling and optimization in improving the focusing properties of a variety of charged particle optics systems. The combined use of several software packages and …
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Exploring the impact of detection physics in X-ray CCD imagers and spectrometers
This thesis is concerned with exploring the way in which the physics of the detection process affects the quality of a CCD-based X-ray detector system. The physical processes which lead to the final images and spectra achieved with a CCD-based camera system are investigated through a combination of …
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Measurement of the Wavelength of the Lyman-alpha1 Transition of 208Pb81+ Using FOCAL Spectrometers
… Lyman-alpha1 Transition of 208Pb81+ Using FOCAL Spectrometers - The goal of the experimental study is the determination of the 1s Lamb shift of a one-electron, very heavy ion with high precision by an accurate spectroscopy of the corresponding Lyman-alpha transitions. Unlike low-Z systems the …
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Rapid Assessment of Quality Parameters in Processing Tomatoes using Handheld and Bench-top Infrared Spectrometers and Multivariate Analysis
Two portable infrared sensors were evaluated for the rapid determination of quality parameters in processing tomatoes. A total of 370 hot-break juices were prepared from ~40 processing tomato varieties grown in 5 California counties. The levels of sugars (glucose and fructose), acids (citric, …
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