Global ETD Search
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 14 of 14 for “"X-ray detection"”.
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QUANTIFICATION OF LOW ENERGY X-RAY DETECTION IN EDS DETECTORS
… an empirical parameter is computed from the x-ray spectra. This parameter represents absorption of lower energy x-rays by the EDS detector and depends on electron beam conditions and the specimen-detector configuration in the scanning electron microscope. The ease of computation of this …
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Halide Perovskite and Metal-Organic Framework Composites for X-ray Detection
Our ability to detect X-ray radiation and generate detailed images on internal structures in a non-destructive manner, has had profound impacts on all of our lives. Whether that is through medical imaging, allowing vital diagnosis of tumours and visualisation of broken bones; through security …
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Development and Characterisation of Halide Perovskite Visible Light and X-Ray Detection Devices
… advance these technologies. Visible light and X-rays make up two regions of the electromagnetic spectra, both key bands for imaging in different modalities. The visible spectrum represents the energies we can detect with our eyes, while X-rays are highly penetrative and allow the inside of opaque …
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Improving Object Classification in X-ray Luggage Inspection
X-ray detection methods have increasingly been used as an effective means for the automatic detection of explosives. While a number of devices are now commercially available, most of these technologies are not yet mature. The purpose of this research has been to investigate methods for using x-ray …
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High-resolution detectors for soft X-ray spectroscopy
Resonant Inelastic X-ray Scattering (RIXS) is a modern soft X-ray spectroscopy technique used to investigate the structure of and excitations in materials. It requires high resolution spectrometers and a brilliant, tunable, X-ray source and therefore is carried out at spectrometers such as SAXES at …
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Detection of improvised explosive devices at long-range using coded aperture imaging of backscattered X-rays with dynamic reconstruction
Standoff detection of improvised explosive devices (IEDs) is a continuing problem for the U.S. military. Current X-ray detection systems cannot detect explosives at distances above a few meters and with a source-detector system moving in relation to the target. The aim of this study is to determine …
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Developing a Gluten, Soy, Dairy, and Nut Free Energy Bar with a Suggested Haccp Plan
… had one CCP that could be overcome using an X-ray detection system.
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Active pixel sensors for X-ray astronomy
An active pixel sensor array, APS-1, has been fabricated for the purpose of scientific x-ray detection. This thesis presents the results of testing the device. Alternate design architectures are explored. Recommendations are made for a next-generation sensor. CCDs have been the dominant x-ray …
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Development of a flat-panel x-ray source
<p>"A novel flat-panel transmission type X-ray source was developed for both medical and industrial use. Depending on the geometry of the given situation, the flat-panel X-ray source could be used in tomography, radiography or tomosynthesis. Furthermore, the unit could be used as a portable X-ray …
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INFORMATION TRANSFER EFFICIENCY OF X-RAY IMAGE INTENSIFIER-BASED IMAGING SYSTEMS.
… information transfer efficiency of any quantum detection imaging system can be described by a unique measure: the detective quantum efficiency {DQE(f)}, which is a function of the statistically independent frequency channels. The DQE(f) is a combined descriptor which takes into account the …
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Spitzer's Contribution to the AGN Population
… selection techniques (e.g. UV/ optical/X-ray). To do so, we take particular advantage of the mid-IR, which is minimally affected by obscuration. We first select as AGN candidates those objects whose radio emission is significantly brighter, relative to the mid-IR, than would be predicted …
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Exploring the impact of detection physics in X-ray CCD imagers and spectrometers
… 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 simulations and …
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3D detectors for synchrotron applications
… sharing means they could potentially improve X-ray diffraction measurements at synchrotrons such as Diamond Light Source. This would allow these experiments, for example, to determine the structures of biological molecules more accurately. However, before 3D devices can be used in practical …
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Silicon Carbide sensors for the detection of Charged Particles and X-Rays [Sensori in Carburo di Silicio per la Rilevazione di Particelle Cariche e Raggi X]
La rilevazione della radiazione ionizzante è di fondamentale importanza in molti ambiti scientifici e tecnologici, tra cui la fisica nucleare e la medicina. I recenti progressi nella fisica dello stato solido hanno posto le basi per lo sviluppo di rivelatori a stato solido per radiazione …