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 24 for “"plasma formation"”.
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Multiphysics Model of Hypervelocity Impact and Impact Induced Plasma Formation
… target. While several experiments have observed plasma formation and associated electromagnetic (EM) emissions, key questions remain unresolved — including the source of ionization (projectile, target, or ambient medium), the plasma composition, and the spectral radiance of emitted EM waves. …
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The Impact of Plasma Formation on the Radar Cross-Section of Objects in Hypersonic Sub-Orbital Flight
L'abstract è presente nell'allegato / the abstract is in the attachment
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Current-drive and plasma-formation experiments on the Versator-II tokamak using lower-hybrid and electron-cyclotron waves
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Energy deposition into heavy gas plasma via pulsed inductive theta-pinch
… objective of this research is to study the formation processes of a pulsed inductive plasma using heavy gases, specifically the coupling of stored capacitive energy into plasma via formation in a theta pinch coil. To aid in this research, the Missouri Plasmoid Experiment Mk. I (and later Mk. …
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Light Emission from Zinc Oxide Nanoforest Plasma
… dioxide. High voltage (up to 80 V) induced plasma formation is reported with high intensity arcs of characteristic blue light. Easy and reproducible plasma formation is obtained on patterned microstructures of highly doped silicon. Both DC stress and AC stress with variable frequency were …
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Dynamics of pions in ultrarelativistic heavy ion collisions
… begin either as a pion fluid or as a quark-gluon plasma, depending on the initial energy density. A pion fluid is also formed when the expanding plasma hadronizes. In this thesis, we study the dynamics of pions in the post-hadronization central region to develop probes of quark-gluon plasma …
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Particle-in-Cell Simulations Examining AK Gap Closure Mechanisms in the Pinch Reflex Diode
… with experimental values. The effects of cathode plasma formation with various desorption rates are studied. Also examined are different cathode plasma species including H, H2, N2, H2O, and C. While the presence of heavier plasma species results in lower ion current production, total diode current …
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Studies of Ξ+c production in pPb collisions
… These measurements can provide important information on the hadronisation of charm hadrons, as well as on the hadron structure. Since the Ξc+ contains s quark, the enhancement can be an indication of Quark Gluon Plasma formation.
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A cold strontium Rydberg gas
… transfer at the very onset of ultra-cold plasma formation.
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A Computational Study of A Lithium Deuteride Fueled Electrothermal Plasma Mass Accelerator
… speeds and high repetition rates into the hot plasma core. There have been several studies and concepts for pellet injectors generated, and different devices have been proposed. In addition to fueling, recent studies show that it may be possible to disrupt edge localized mode (ELM) formation by …
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Physical Conditions and Chemical Processes During Single-Bubble Sonoluminescence
… provides definitive experimental evidence of the formation of a plasma. By using various techniques (e.g., small molecules and atoms as intra-cavity probes, standard methods of plasma diagnostics, and spectrometric methods of pyrometry), it was possible to quantify the heavy particle temperatures …
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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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Laboratory evaluation of laser-induced breakdown spectroscopy (LIBS) as a new in situ chemical sensing technique for the deep ocean
… deals with the extreme nature of laser-induced plasma formation was developed that allows for statistically accu- rate comparisons of spectra. The use of both single and double pulse LIBS for high pressure bulk aqueous solutions is explored and the system parameters needed for the detection of …
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Verification and Validation of Magnetohydrodynamics Simulations of Electrically Exploded Conductors
… 2D/3D effects are significant for plasma formation. Experimental velocimetry measurements were used to validate the location of the vaporization curve in existing EOS models and differentiate between the vapor dome treatments. Dielectric coatings applied to the metal surface …
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Development and testing of a solid core fiber optic delivery system and ultraviolet preionization for laser ignition
… and in the presence of vibration, reliable spark formation could be achieved in pressures as low as 3.4 bar using a specially designed optical spark plug. Comparative tests between the fiber delivered laser ignition system and a traditional J-gap spark plug were performed on a single cylinder …
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TRANSVERSE MOMENTUM EVOLUTION OF HADRON-V0 CORRELATIONS IN PP COLLISIONS AT 7 TEV
… of a new state of matter, called the Quark Gluon Plasma. The main aim of this dissertation is to identify particle production mechanisms in pp collisions, also as a reference for possible modifications due to the plasma formation in heavy-ion collisions. Two-particle azimuthal correlation …
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Laboratory evaluation of laser-induced breakdown spectroscopy (LIBS) as a new in situ chemical sensing technique for the deep ocean
… deals with the extreme nature of laser-induced plasma formation was developed that allows for statistically accurate comparisons of spectra. The use of both single and double pulse LIBS for high pressure bulk aqueous solutions is explored and the system parameters needed for the detection of the …
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Measurements of prompt \mathrm{\Lambda_c^+/D^0} ratio as a function of multiplicity at the ALICE experiment: An investigation of charm hadronization in small systems
… collisions to study the impact of quark–gluon plasma formation on charm quark hadronization. This thesis, aims to understand the charm quark hadronization in small systems by its evaluation as a function of system size. We also examine event generators alongside experimental data, both of which …
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Investigation of the acoustic source characteristics of high energy laser pulses models and experiment
… of the pulse exceeds the threshold required for plasma formation. The resulting acoustic wave falls into the highly non-linear shock regime. Later work by Vogel et al. sought a more complete understanding of the non-linear dynamics and energy distribution of this process in an attempt to limit …
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Experimental studies of the electrothermal instability using electrically thick, coated metal
… manifestation of the instability organizes any plasma that forms into filamentary streamers parallel to the current. For a typical electrically thick bare metal with lineal current density increasing at 3×10^15 A/m/s, the time window between when the stratified instability is observable and the …
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