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 11 of 11 for “"neutron field"”.
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Evaluation of the bubble spectrometer performance in space-like neutron fields
… of six bubble detectors each with a different neutron energy threshold. To characterize the spectrometer in a space-like neutron field, a series of experiments were conducted with high-energy neutrons from 6.0×105 eV to 7.50 ×108 eV at the Los Alamos National Laboratory. The analysis of the …
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Investigation of the bubble detector response to high LET space radiation
… aboard spacecraft is a complex mixture of neutrons, photons, protons, heavy ions and other particles. A special type of superheated droplet detectors referred to as space bubble detectors (SBD) have been used to evaluate the equivalent dose due to neutrons in various space missions aboard …
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Development of image processing systems for cosmic ray effect analysis
Cosmic neutron radiation in the atmosphere is a harsh environment for modern aircraft electronics. High-energy neutron interactions with silicon produce spurious charge which can cause malfunctioning or even failure to advanced microelectronic devices. To study neutron interactions, a CCD based …
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Experimental Validation of the Monte Carlo-based Shielding Design of the UIUC D-T Neutron Metrology Facility
… scatter-based experiments to characterize fast-neutron sensitive detectors. We simulated the facility using the Monte Carlo code MCNP to quantify the dose that facility operators and the general public will be exposed to during facility operations. Also, validation of the simulated results was …
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Characterization of a Diamond Proton Recoil Telescope for DT Neutron Measurements in the LIBRA Experiment
… tritium breeding using beam-target style DT neutron generators to irradiate molten salt vessels. A critical aspect of understanding this process is the characterization of the energy and flux anisotropies within the neutron environment, which are inherent to the beam-target neutron generation …
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Design and characterization of next-generation tissue equivalent proportional counters for use in low energy neutron fields
… measure the radiation dose levels for the mixed neutron and gamma ray fields that are encountered in nuclear facilities. TEPC designs typically consist of a low density gas sensitive volume surrounded by a solid wall, each of which is composed of tissue-equivalent material. The response of a TEPC …
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The application of experimental microdosimetry to mixed-field neutron-gamma dosimetry
Absorbed dose distributions in lineal energy for neutrons and gamma rays were measured by using both a tissue-equivalent walled counter (TEPC) and a graphite-walled low pressure proportional counter (GPC) in the Am-Be neutron source facility at University of Ontario Institute of Technology. A …
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Design and testing of a novel neutron survey meter
… which can estimate the effective dose of a neutron field, accounting for both direction and energy of the field. This work represents a novel, real-time, approach to workplace directional neutron dosimetry. A 6Li-loaded scintillator based detector system was developed. This detector system …
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Cosmic-ray neutron sensing for soil moisture measurements in cropped fields
… of the detection of natural background of fast neutrons, the so-called cosmic-ray neutron sensing (CRS) approach to measure field-scale soil moisture in cropped fields. Primary cosmic rays penetrate the top atmosphere and interact with atmospheric particles. Such interaction results on a cascade …
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Messung und Analyse von neutroneninduzierten Aktivitäten in Materialien zukünftiger Kernfusionsreaktoren
The radioactivity induced by neutrons in the materials of future fusion devices represents a central topic of safety- and environmental-related investigations. For the design and operation of future fusion devices, like the International Experimental Thermonuclear Reactor ITER or power plants like …
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Výpočetní analýza neutronových polí generovaných pokročilými spalačními terči
… práce obsahuje úvod do problematiky generování neutronů pomocí urychlených částic. Následně popisuje základní parametry spalačních neutronových zdrojů a vývoj designu spalačních terčů. V praktické části je pak provedena výpočetní analýza neutronových polí generovaných spalačními terči tvořených …