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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 “"Neutron Imaging"”.
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Reciprocal space phase gradient neutron imaging
Perfect crystal real space imaging has limitations in its resolution imposed by position sensitive detectors. The disadvantage, its limited resolution, of a position-sensitive detector can be overcome by replacing the conventional detector with an area detector and moving to reciprocal space. …
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Oscillating heat pipes : study of their oscillating motion using neutron imaging and application
… THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Neutron imaging produces unique images of objects making it a useful nondestructive technique with various applications in science and industry. Oscillating heat pipes (OHP) are being studied as a higher performance way of cooling high power …
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High Flux Neutron Imaging for highly dynamic and time resolved non-destructive testing
… hier beschriebenen Arbeit wurde eine Anlage für Neutronenradiographie und -tomographie, Neutrograph, am Institut Laue-Langevin (ILL) weiterentwickelt, Experimente durchgeführt und neue Mess- und Auswertungsmethoden entwickelt. Die Besonderheit von Neutrograph ist seine konkurrenzlose Intensität …
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TRU-ART: A cost-effective prototypical neutron imaging technique for transuranic waste certification systems
… in radioactive waste reprocessing and neutron tomography.
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An accelerator-based neutron imaging system and its application to detection of corrosion in aircraft
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1995.
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Development and Characterization of a Fast Neutron Imaging Telescope (FNIT) for 1--20 MeV Neutrons From the Sun and Nuclear Material
… of a double scatter telescope for 1--20 MeV neutrons intended for applications in solar physics and nuclear security. In high-energy solar physics, detecting the presence of low energy accelerated ions in the low corona is recognized as an important goal. The surest indication of the …
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Applications of neutron radiography & tomography
… represents the investigation and development of neutron imaging techniques as a versatile method that can be used to reveal the presence, position, size, morphology, and chemical composition of structures and materials within a sample. The underlying physics of neutron radiography and tomography …
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Beam characterization at the neutron radiography reactor
The quality of a neutron imaging beam directly impacts the quality of radiographic images produced using that beam. Fully characterizing a neutron beam, including determination of the beam's effective length-to-diameter ratio, neutron flux profile, energy spectrum, image quality, and beam …
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Three-dimensional magnetic domain imaging with polarized neutrons
… for studying magnetic domains are limited to imaging near-surface magnetic structure. Techniques for investigating bulk magnetic structure are under development, particularly for applications in electronics and superconductivity. This study investigates the feasibility of observing bulk …
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New considerations for compact cyclotrons
… compact cyclotrons: generation of ¹³ for medical imaging, active interrogation for counter-proliferation, and fast neutron imaging for Enhanced Stockpile Surveillance (ESS). The first two applications are broadly reviewed. The ESS imaging application extends from preliminary work performed by …
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Observing flow using fast neutron radiography and positron emission particle tracking
… flow of material has been studied using fast neutron radiography (FNR) and positron emission particle tracking (PEPT). A new fast neutron imaging system was commissioned at The South African Nuclear Energy Corporation, Pretoria, as part of this study, although FNR measurements were ultimately …
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Coherent control of neutron interferometry
… information processing using a single crystal neutron interferometer. In particular we introduce methods for reciprocal space encoding of spatial information systematically in a neutron interferometer. First, a proof of principle experiment is conducted for coherent reciprocal space neutron …
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Development of 3D Silicon radiation detectors for neutrons and high energy charged particles
… in microstructured solid-state thermal neutron detectors have been pursued. These devices feature high aspect-ratio cavities, filled with neutron converter materials, so as to improve the neutron detection efficiency with respect to coated planar sensors. In the framework of the INFN …
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Neutron scattering and microscopy studies of the structure and dynamics of water near a nanostructured hydrophilic copper oxide surface
… this hypothesis, we have proposed time-resolved neutron imaging experiments to characterize the kinetics of water oscillations in CuO-coated OHPs.
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Towards the development of an explosives detection system using Neutron Resonance Radiography
… that mandate screening 100% of checked luggage. Neutron Resonance Radiography (NRR) has been under investigation as a supplement to conventional x-ray systems as a non-invasive, non-destructive means of detecting explosive material in checked luggage. Using fast (1-6 MeV) neutrons produced by an …
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Development and use of advanced nuclear diagnostics and neural networks to diagnose 3D morphology and power balance in inertial fusion implosions at OMEGA and NIF
… diagnostics that probe asymmetries, such as the neutron imaging system, the real-time neutron activation detectors, and the neutron time-of-flight spectrometers. Our technique uses a forward-fit to a simplified physics model to produce a single self-consistent 3D picture of the implosion. Markov …
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Characterisation of radiation fields with combined fast-neutron and gamma-ray imaging
… their emitted radiation fields through passive imaging techniques. The research sought to expand upon existing gamma-ray imaging techniques, but with focus on fast-neutron imaging techniques which are few in number. The study involved conceptual design, Monte Carlo optimisation and …
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Rotating Thin Films: the Vortex Fluidic Device
… occurs under turbulent or laminar conditions. Neutron imaging experiments, conducted at the Australian Nuclear Science and Technology Organisation (ANSTO), gave an insight to the film thickness at steady state in CM. The technique is more appropriate for stationary objects, thus a new …
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