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 20 of 23 for “"Plasma Model"”.
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Quantum non-contact friction in resonant dielectric media
… isotropic planar dielectric slabs which obey a plasma model dielectric function using scalar electromagnetism. All computations are carried out at zero temperature. Strong constraints on the integration parameters which define the friction force are derived and subsequently used for a variety of …
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Multi-physics modeling of plasma discharge and material removal in micro electro-discharge machining process
… a strong need for development of a physics-based model to gain fundamental knowledge of the micro-EDM process. In this research work, a multi-physics model of the micro-EDM process has been developed to understand formation and expansion of micro-EDM plasma, and the process of formation of …
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Development of an antirheumatic drug
… were monitored in vitro using the computer blood plasma model.
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Characterization of a Low Current LaB6 Heaterless Hollow Cathode with Krypton Propellant
… the only diagnostic tool used experimentally. A plasma model is used to infer plasma parameters in the cathode emitter region. The cathode characterization results are consistent with those obtained during previous investigations of 1 A-class LaB6 hollow cathode with krypton. A peak-to-peak anode …
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Using Machine Learning to Generate a Surrogate Model for Plasma-Surface Interactions
Plasma-surface interactions are an important effect in laboratory plasmas, but too complicatedto be modelled directly in plasma simulations. However, plasma surface interactions can be modelled by Transport and Range of Ions in Matter (TRIM) simulations based on a binary collision approximation of …
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A Theoretical Model for Calculation of Molecular Stopping Power
<p>A modified local plasma model based on the work of Linhard-Winther, Bethe, Brown, and Walske is established. The Gordon-Kim's molecular charged density model is employed to obtain a formula to evaluate the stopping power of many useful molecular systems. The stopping power of H<sub>2</sub> and …
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Modeling enhanced impurity sputtering due to rf sheaths in front of ICRH actuators
… antenna. Here we present a semi-analytical fluid plasma model able to capture the enhanced sputtering yield from the Faraday Screen and the Plasma- Facing Components of an Ion Cyclotron Resonance Heating antenna in a fusion machine. The model is a one-dimensional phase-resolved model of a …
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Development and Modelling of a Low Current LaB₆ Heaterless Hollow Cathode
… characteristics compared to xenon. An original model for the insert region plasma is derived by combining several analyses in literature. This model allows the simultaneous calculation of many plasma and thermal parameters in the cathode using only two completely unobtrusive measurements, and …
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Multi-physics modeling of plasma discharge, material removal and debris ejection in electrical discharge machining with flowing dielectric film
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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A technique for implementing complex boundary configurations in industrial plasma modelling and simulation
The use of plasma as an industrial tool has become the norm within the surface treatment industry. However, our understanding of the plasma surface interactions is still within the R&D phase. What can be done experimentally is limited due to the electromagnetic properties of plasma and the …
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Performance of a Plasma Torch with Hydrocarbon Feedstocks for Use in Scramjet Combustion
… at Virginia Tech on a high-pressure uncooled plasma torch to study torch operational characteristics with hydrocarbon feedstocks and to determine the feasibility of using the torch as an igniter in scramjet applications. Operational characteristics studied included electrical properties, such …
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Computer simulation of metal-ion equilibria in biochemical systems : models for blood plasma
… binding to low molecular weight ligands in blood plasma. A successful attempt is made to accommodate the effects of metal protein binding on the computed distribution that is obtained. An evaluation of the results is undertaken. The value and some applications of the knowledge arising from this …
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A study of FT-IR spectroscopy for the identification and classifcation of haematological malignancies
… component fed linear discriminant spectral models have been tested with leave one out cross validation procedures. A preliminary unfiltered classification model using 50 frozen and air-dried samples correctly classified 54% of 18556 spectra. The performance improved with the three cell line …
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Time-domain terahertz magneto-spectroscopy of semiconductors
… theoretical simulations based on a cold magneto-plasma model demonstrate that this novel phenomenon is a manifestation of coherent interference of the cyclotron-resonance-active and cyclotron-resonance-inactive modes co-propagating through the magneto-plasma along the magnetic field direction. …
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Synthesis and design of ligand copper complexes as anti-inflammatory drugs
… the speciation of other metal ions in blood plasma. Speciation calculations using a blood plasma model were used to estimate the complexing ability of the ligands in vivo. This result showed that [H(555)NH2] was the best at mobilising copper in vivo.
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Mitigation of RF sheaths through design and implementation of magnetic field-aligned ICRF antenna
… or elimination of impurities introduced into the plasma during ICRF operation, particularly for tokamaks with high-Z plasma facing components (PFCs). Plasma impurities associated with ICRF auxiliary heating are universally observed [3, 4, 5, 6]. However, the underlying physics of ICRF-specific …
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Modelling and Control of Magnetic Fusion Plants Based on ARM CPU and STM32 MCU Platforms
This thesis is devoted to the modelling, design and implementation of systems that can be integrated into magnetic fusion plant controllers. These systems, usually referred to as control and data acquisition systems, supply the interface to all the instrumentation required for the nuclear fusion …
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Development and simulation of a cylindrical cusped-field thruster and a diagnostics tool for plasma-materials interactions
A low power, Hall-effect type plasma thruster known as the MIT-Cylindrical Cusped- Field Thruster (MIT-CCFT) has been developed and simulated using a fully-kinetic plasma model, the Plasma Thruster particle-in-cell (PTpic) model. Similar to the Diverging Cusped-Field Thruster (DCFT) previously …
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Simulating artificial lightning and composite damage
… a strike. Literature has shown lightning can be modelled as a plasma (an ionised gas) and has been idealised into four electric current waveforms of varying current and duration. Authors have almost exclusively modelled just one of the key lightning physics (plasma, thermal-electric, pressure or …
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Ignition and hydrodynamic ejections by laser-induced breakdowns
… breakdown of gas, forming a high-temperature plasma that rapidly absorbs laser energy. As a source of heat and radical species, laser-based energy deposition can be an effective ignition source, and its relative versatility and precision make it an attractive alternative to conventional …
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