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 6655 for “"plasma"”.
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Transient antenna-plasma interaction in inductive plasma thrusters
… technologies under consideration, inductive plasma thrusters are a promising candidate due to their high thrust density and proven propellant flexibility. In contrast with conventional space propulsion technologies, inductive coupling can deliver energy to a propellant without direct contact, …
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PLASMA-SURFACE INTERACTIONS DURING REACTIVE PLASMA PROCESSING OF HYDROCARBON FILMS
Reactive plasma interactions with hydrocarbon-based surfaces play a critical role in future biological-plasma applications and for microelectronic device manufacture. As device dimensions get smaller and we require fine control of surfaces during plasma processing we will need to develop more …
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Antimicrobial activity of human seminal plasma and seminal plasma proteins
Seminal plasma is semen without the spermatozoa. Human seminal plasma is a complex mixture of secretions from the sex accessory glands, mainly the seminal vesicles and the prostate. Seminal plasma has high protein content and it also contains ions, sugars and low molecular weight components. …
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A study of solitary plasma rings in axisymmetric plasma configurations
In this thesis, we search for the plasma and field configurations that can exist under stationary conditions around a collapsed object such as a black hole. Regimes where the iso rotational condition corresponding to negligible magnetic field diffusion have been considered. Under the basic …
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Plasma-coupled microcombustion
… of macro-scale (>mm) flames has shown that plasma coupling can be an effective method to stabilize and enhance combustion. The applicability of plasma in the particular case of micro-scale flames has yet to be investigated. In this dissertation, a multi-scale approach is used to build models …
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Observation of plasma sheath modulation in the plasma bipolar junction transistor
Modulation of the plasma sheath in a plasma bipolar junction transistor (PBJT) is observed for base inputs of less than one volt. Using the recorded data, along with a collisional, high-voltage sheath model developed herein, a 359% increase in the secondary electron emission coefficient of the …
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Atomistic Simulation Of Plasma Interaction With Plasma Facing Components In Fusion Reactors
<p>The interaction between plasma and fusion relevant materials is one of the critical issues in successfully using those materials in Tokamak reactors. This research uses molecular dynamics, kinetic Monte Carlo and binary collision approximation methods to model fusion relevant material bombarded …
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Development of high energy pulsed plasma simulator for plasma-lithium trench experiment
… lithium infused trench (LiMIT) device, a pulsed plasma source utilizing a theta pinch in conjunction with a coaxial plasma accelerator has been developed. An overall objective of the project is to develop a compact device that can produce 100 MW/m2 to 1 GW/m2 of plasma heat flux (a typical heat …
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Modeling the non-transferred arc plasma torch and plume for plasma processing
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1992.
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Laser plasma particle velocities
Experiments were performed on laser produced plasma from aluminum target discs in a vacuum chamber at pressures a few times 10(-6) torr. Plasma analysis was achieved using a floating double electrostatic probe of tungsten wires biased at -15 volts DC. In analyzing 376 oscilloscope trace pictures of …
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Nested Well Plasma Traps
Criteria for the confinement of plasmas consisting of a positive and negative component in Penning type traps with nested electric potential wells are presented. Computational techniques for the self-consistent calculation of potential and plasma density distributions are developed. Analyses are …
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Supersonic Constricted Plasma Flows
… in space. A weakly ionised capacitively coupled plasma is ignited in the flowing Ar gas propellant within a constricted discharge chamber at 1 Torr using less than 10 W of radiofrequency power. The discharge can operate either continuously or in rapid pulsed mode since plasma breakdown initiates …
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Multi-fluid Plasma Modelling
Contemporary plasma fusion experiments use significant power injection for plasma heating. The injected power selectively heats only part of the plasma, which then transfers its energy to the rest of the plasma through collisions. Continuous power injection gives rise to a dynamic equilibrium …
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Supersonic Constricted Plasma Flows
… in space. A weakly ionised capacitively coupled plasma is ignited in the flowing Ar gas propellant within a constricted discharge chamber at 1 Torr using less than 10 W of radiofrequency power. The discharge can operate either continuously or in rapid pulsed mode since plasma breakdown initiates …
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Multi-fluid Plasma Modelling
Contemporary plasma fusion experiments use significant power injection for plasma heating. The injected power selectively heats only part of the plasma, which then transfers its energy to the rest of the plasma through collisions. Continuous power injection gives rise to a dynamic equilibrium …
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Addressable plasma photonic crystals
Photonic crystals that comprise arrays of microplasmas can act as recon g- urable lters in the microwave and THz spectral regions. When compared to conventional photonic crystals fabricated in a solid, plasma photonic crystals are recon gurable at electronic speeds which, in turn, allows for the …
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Electrostatic-Inertial Plasma Confinement
Made available in DSpace on 2014-12-11T17:25:59Z (GMT). No. of bitstreams: 1 7105085.pdf: 3320550 bytes, checksum: 8e6a570cbd7a876c9d2c1260fe8a8206 (MD5) Previous issue date: 1970
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Hybrid plasma-semiconductor devices
A hybrid plasma-semiconductor phototransistor has been realized by substituting a plasma for the collector of an npn bipolar junction transistor. Designated as the plasma bipolar junction transistor (PBJT), this optoelectronic device relies on the correspondence between the properties of a low …
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