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 19 of 19 for “"plasma diagnostic"”.
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Extraordinary mode absorption at the electron cyclotron harmonic frequencies as a tokamak plasma diagnostic
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1986.
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Utilization of the reaction ¹⁰B(d, n)¹¹C as a high temperature deuterium plasma diagnostic
Includes bibliographical references (page 57).
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Time-resolved characterisation of pulsed magnetron discharges for the deposition of thin films with plasma diagnostic methods
Research on the characterisation and understanding of pulsed magnetron discharges used for the deposition of thin, especially dielectric, films has been carried out between 2003 and 2008 at Chemnitz University of Technology. This thesis is a collection and summary of the original research during …
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Time-resolved characterisation of pulsed magnetron discharges for the deposition of thin films with plasma diagnostic methods
Research on the characterisation and understanding of pulsed magnetron discharges used for the deposition of thin, especially dielectric, films has been carried out between 2003 and 2008 at Chemnitz University of Technology. This thesis is a collection and summary of the original research during …
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Construction of a gridded energy analyzer for measurements of ion energy distribution in the versatile toroidal facility
The Versatile Toroidal Facility (VTF) at MIT's Plasma Science and Fusion Center provides a laboratory environment for studying ionospheric plasmas. Various plasma diagnostic devices have been created and used to study the VTF plasma since 1991. An accurate method for measuring VTF's ion …
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Characterization of a Magnetically Contained Hot Filament Plasma Source with a Wide-Sweeping Langmuir Probe
<p>Ionospheric plasma research in the Space and Atmospheric Instrumentation Laboratory’s Space Plasma Chamber has been hindered by the lack of a suitable plasma diagnostic instrument and understanding of its hot-filament plasma source. This thesis describes efforts made to remedy both problems. A …
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Active screen plasma surface engineering of austenitic stainless steel for enhanced tribological and corrosion properties
Low temperature plasma surface engineering has been a useful method for increasing the hardness and wear resistance of austenitic stainless steel without reducing the corrosion resistance of this alloy. Plasma carburising is of particular interest as it produces thicker hardened layers than plasma …
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Two-Color Heterodyne Interferometry for PI3 Line-Averaged Plasma Density Measurements
… interferometry, which is a technique used for plasma density diagnostics in fusion experiments. Funded through a Mitacs Accelerate internship, this work focused on improving vibration compensation of the existing multi-chord interferometer used at General Fusion for line averaged plasma density …
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Development of PVD coating processes informed by plasma diagnostics.
… development of PVD technology and in particular plasma sources for vapour generation that can provide the necessary tools.This thesis describes plasma diagnostic studies of plasma discharges, developments of plasma sources and deposition of CrN coatings. Initially the project investigated vacuum …
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High quality high current ion beam generation and transport systems including plasma-based space charge neutraliser
… solver were used to determine beam optics.2. Plasma generation: The ion beam is extracted from a plasma generated in the ion source. Therefore, thequality of ion beams depends largely on the characteristics of the source plasma. Plasma diagnostic tools were used to understand the desired …
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The study of overlapping sheath and dust particle structures in dusty plasma.
Complex (dusty) plasma consists of plasma and dust particles which vary in size from nanometer to millimeter in diameter. Complex plasma exists across many different environments, and can be found in environments from the cosmos to industry. Due to plasma fluxes to its surface, a dust particle …
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Langmuir Probe Instrument Suite for Mesosphere Turbulence Experiment Mission
… probe technique is the predominant in-situ plasma diagnostic technique, and is arguably the only measurement technique that is universally own on every sounding rocket investigation. Earth's mesosphere region (80-120 km) is a host of many dynamic phenomena such as the noctilucent clouds, …
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Chemical studies of plasma etchants used in integrated circuit manufacture
Plasma or "dry" etching is an essential process for the production of modern microelectronic circuits. However, despite intensive research, many aspects of the etch process are not fully understood. The results of studies of the plasma etching of Si and Si02 in fluorine-containing discharges, and …
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Radical probe system for in-situ measurements of radical densities of hydrogen, oxygen and nitrogen
… optical equipment. In this study Center for Plasma Material Interactions (CPMI) at the University of Illinois developed an in-situ catalytic radical probe system together with Ra-Den software platform to measure concentrations of reactive species in low temperature plasma with high spatial …
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Plasma Electron Density Measurement Using Homodyne and Heterodyne Interferometers
Measurement of the electron density in a plasma using interferometry. Two different interferometer designs, homodyne and heterodyne are studied in two fusion reactor systems namely Tokamak and flow through Z-pinch device.
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Development of 0 – D argon collisional radiative model conjoined with optical emission spectroscopy for radio frequency plasma
Plasma-based processes are becoming increasingly popular due to a rising demand for nano-scale semiconductor chips, and as a result, understanding plasma and its processes has become crucial. Multiple diagnostic tools such as Langmuir probes (LP), retarding field energy analyzers (RFEA), …
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High power impulse magnetron sputtering (HIPIMS) : Fundamental plasma studies and material synthesis.
… thesis describes fundamental research of the plasma properties, mainly temporal and spatial evolution of ions and electrons in dependence on the external parameters such as applied power and working gas pressure. The initial period of the PhD project consisted of learning to use and interpret …
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Hybrid microplasma-semiconductor transistor and frequency modulator
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-12-01
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Elucidating trends and transients in CO2 dissociation
… a light on processes that occur in non-thermal plasmas containing CO2, mostly for CO2 conversion. In particular, the focus lies on the transient behaviour of these discharges: how do these systems evolve over time before they settle in a (non-thermal) equilibrium. In addition to that, it …