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Showing 1 to 15 of 15 for “"irradiation temperature"”.
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The effect of irradiation temperature on REBCO Jc degradation and implications for fusion magnets
Recent advances in high temperature superconductors (HTS) have opened up a new parameter space for the design of tokamak fusion pilot plants. While previously the maximum on-axis field in a superconducting tokamak was limited to ~6 T, HTS allows tokamaks to be designed with much higher on-axis …
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Radiation damage in nickel(3) aluminum
… investigation of cascade damage under heavy ion irradiation; the second is a radiation induced segregation study. For the first topic, the cascade generated damage structure (namely, disordered zones and dislocation loops) were examined as a function of ion mass (Ar$\sp+$, Kr$\sp+$, Xe$\sp+$), …
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Phase and Microstructural Stability in Immiscible Binary Alloys Under Irradiation
… multilayers. We find that, regardless of the irradiation temperature, extensive grain growth takes place. In the regime when thermal decomposition is in dynamic balance with irradiation mixing, phase separation takes place at a finite-length scale, of the order of the nanometer, in agreement …
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Heavy-ion damage in copper, nickel and dilute nickel alloys
… materials differ in their response to heavy-ion irradiation, the reasons for this are not yet fully understood. To more fully characterize the effects of material, alloying element, irradiation temperature and ion dose on the probability of collapse of a displacement cascade, Cu, Ni, and dilute …
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X-ray induced temperature dependent amorphous-amorphous transitions in the GeO2 glass
… thesis investigates the effects of intense X-ray irradiation on vitreous germanium dioxide (v-GeO2), a prototypical strong oxide glass, by combining X-ray photon correlation spectroscopy (XPCS), X-ray diffraction (XRD), and inelastic X-ray scattering (IXS). The results demonstrate that intense …
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Microstructural investigations of ion (Kr) irradiated UO2
… from 1x1014 ions/cm2 to 1x1016 ions/cm2 and temperatures ranging from room temperature to 1000°C. These irradiations were conducted ex situ with one in situ irradiation at 800°C. Post irradiation examination was conducted using transmission electron microcopy to study and characterize the …
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In situ transmission electron microscopy ion irradiations of model iron-chromium alloys
… of a nuclear reactor. We examine the effects of temperature and chromium concentration on the defect evolution and segregation behavior in the early stages of damage. In situ irradiations are conducted in a transmission electron microscope (TEM) at 300°C and 450°C with 150keV iron ions in single …
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Advanced characterization of the early-stage evolution of microstructures and mechanical properties in neutron-irradiated commercial steels
In this project, the post-irradiation microstructures and mechanical properties of two types of Fe-Cr ferritic-martensitic (F-M) steels, HT9 and T91, were characterized. The materials were irradiated in the Advanced Test Reactor (ATR) at different temperatures and neutron fluences. Three …
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Sterility and immunogenicity of gamma-irradiated respiratory viruses
… not be reliable or applicable to estimate the irradiation dose required to sterilise microbiological preparations for vaccine purposes, where bioburden is deliberately high. In this study, I investigated different methods of modelling sterility and developed a new formula for calculating …
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Irradiation damage in neutron-irradiated Fe-Cr model alloys
… resistance to swelling, helium embrittlement and irradiation creep at elevated temperature (T/Tm > 0.4). However, F-M steels exhibit low-temperature irradiation-induced embrittlement that leads to a substantial decrease in toughness at lower irradiation temperature (T < 500°C) even at very low …
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Effects of Implanted Solutes and Heavy -Ion Cascades on the Kinetics of Radiation -Induced Segregation in Binary Alloys
Various electron and dual ion irradiations were conducted to investigate the effect of implanted solutes and heavy-ion cascades on the fluxes of freely-migrating defects which drive radiation-induced segregation (RIS) in Ni-9at.%Al and Cu-1at.%Au alloys. To study the effect of solute implantation …
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Microstructure Evolution of Two Model Ferritic/Martensitic Steels Under Ion Irradiation In A Transmission Electron Microscope
… to radiation damage at the high operating temperatures envisioned in these reactors. To enable the development and optimization of such advanced alloys for in-reactor use, a fundamental understanding of radiation damage accumulation in materials is required. Especially, in order to predict …
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Mechanical properties of materials for fusion power plants
… focus on the role of chromium and the roles of irradiation temperature and irradiation dose. They were also used to extrapolate data related to ssion and attempt to make predictions in fusion conditions. A set of general recommendations concerning the database used to train the neural networks …
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High-Temperature Au Implanted Into Ni
Made available in DSpace on 2017-07-06T18:48:47Z (GMT). No. of bitstreams: 3 James_Michael_R_MS.pdf: 30637392 bytes, checksum: 259bbf5a836f5ce0bf166b7ea42e55c4 (MD5) James_Michael_R_MS_ABS.pdf: 589882 bytes, checksum: 646a5beb7e11516d8c23dd26f785d027 (MD5) license.txt: 4813 bytes, checksum: …
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Temperature elevations due to NIR exposure in the brain tissue
… both for diagnostic and therapeutic purposes. Temperature elevation profile inside the tissue is a critical factor that needs to be better understood in these applications. The purpose of this study is to determine the temperature distribution due to a low power N I R laser irradiation in …