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 10 of 10 for “"Deposition profile"”.
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A Simplified Model of Planetary Chemical Vapor Deposition Reactors
A simplified model for planetary chemical vapor deposition reactors is proposed and used to compute deposition species mole fraction and deposition rate in the reactor depletion zone. First, the modeling and optimization work performed in the literature is reviewed and their representative …
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Electron Bernstein wave current drive modeling in toroidal plasma confinement
… attractive for control of the current profile. In the high-[beta] regimes of spherical tokamaks (ST) such as NSTX and MAST, heating and current drive (CD) by conventional electron cyclotron waves is not possible. However, electron Bernstein waves (EBW) have been proposed as an …
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Finding the edge: Net-shape surface sculpting during cold spray deposition
… a successful method for structuring cold spray deposition was developed, allowing the creation of defined surfaces from a previously uncontrolled deposition profile. When considering both additive and traditional manufacturing techniques, there remains a gap in the market for a high build rate, …
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Diagnostics for ionized physical vapor deposition chambers
… diagnostics are needed to accurately predict the deposition profile of features on the wafer. Traditionally, the incident ion fluxes are considered to be perfectly normal to the wafer plane due to the electric field of the plasma sheath. However from simulation results the ion flux from a …
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Injection Impairment by Suspended Solids: Well Models, Filtration Parameters, and Models’ Validation with 3-D Injection Experiments
… Among currently available models, the solids deposition profile is based on a linear relationship between pressure drop ratio and amount of solids deposition. We propose a second-order relationship that is more accurate in capturing the effects of high injection velocity by incorporating the …
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Pharmaceutical analysis and in-vitro aerodynamic characterisation of inhaled theophylline formulations containing drug particles prepared by supercritical fluid processing. Chromatographic, spectroscopic, and thermal analysis of micron-sized theophylline particles prepared by supercritical fluid technology and in-vitro evaluation of their performance as inhaled dry powder formulations.
… to determine the in-vitro emitted dose and the deposition profiles of SEDS samples, respectively. The effect of different inhalation flows was studied using two different flows 28.3, and 60 L min-1 with 4 L inhalation volume. Different DPI devices were investigated in this study; Easyhaler® and …
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Aerosol Filtration -- Agglomerate Particle Filtration and Particle Deposition Uniformity
… ambient environment, and non-uniform particle depositions are often met. The overall objective of this dissertation is to advance our current knowledge on these two specific areas of aerosol filtration: (1) agglomerate particle filtration and (2) particle deposition uniformity. For the first …
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Impurity transport studies on MAST
… and the neutral beam particle and power deposition profile. It is therefore important to develop both a sound experimental base and reliable models to interpret the experimental results and to predict the transport properties of impurities. Time-dependent helium and methane gas puff …
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Impact of wave-filament scattering in the scrape-off layer during lower hybrid current drive
… is an efficient means to control the current profile in a tokamak. The performance of LHCD is sensitive to the phase-space trajectory of the wave as it propagates and damps in the plasma. These trajectories are scattered by turbulent density fluctuations in the scrape-off layer (SOL), which is …