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Investigations into the polymerization mechanism of a pulsed 1,3-butadiene discharge in an ICP GEC platform /Jindal, Ashish Kumar, January 2007 (has links)
Thesis (Ph.D.)--University of Texas at Dallas, 2007. / Includes vita. Includes bibliographical references (leaves 217-223)
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Energy level populations in excited gasesWebb, C. E. January 1964 (has links)
No description available.
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Inference of charge transfer from lightning flashes in South AfricaTasman, Jesse Dean, Tasman, Jesse Dean January 2019 (has links)
A dissertation submitted in fulfillment of the requirements to the Faculty of Science, University of the Witwatersrand, Johannesburg, for the degree of Master of Science in the School of Electrical and Information Engineering, June 2019 / The objective of this study is to determine the quantity of charge transferred, in
Coulombs, during the continuing current phase of natural cloud-to-ground (CG)
lightning flashes over an area in Johannesburg, South Africa. Continuing current
is responsible for most thermal related lightning damages such as destruction of
property, electrical fires and physical human trauma. The mitigation of lightningrelated
risks can be better managed through improved measurement methods of
naturally occurring lightning. The application of a point-charge model used to
infer charge transfer from changing electric field measurements is detailed. A flatplate
antenna with an integrator is set up to record the changing electric fields
from lightning flashes. These measurements, along with high-speed video footage
to determine continuing current durations, are processed and charge transfer quantities
are inferred. From 34 negative lightning strokes with long continuing current
(i.e. > 40 ms), the quantity of charge transfer ranges from 0.3 C to 145.5 C and
has a mean quantity of 18.3 C. For the 5 recorded positive strokes, the quantity
of charge transfer ranges from 3.7 C to 66.6 C / NG (2020)
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The effects of internal parameters on the breakdown potentials of long low pressure alternating current arcs and glowsBell, Clarence Alton January 2011 (has links)
Digitized by Kansas State University Libraries
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85 |
Arc and glow discharges in an elongated glass tube surrounded by a grounded shieldBakis, Raimo January 2011 (has links)
Digitized by Kansas State University Libraries
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Theoretical computation of the characteristic curve of the A-C gaseous discharge in an elongated tubeWang, Chung Yow January 2011 (has links)
Digitized by Kansas State University Libraries
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Theory of oscillations in a striated dischargeDavis, William D. January 1964 (has links)
Call number: LD2668 .T4 1964 D265 / Master of Science
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The effect of self-generated magnetic fields on Rayleigh-Taylor instability in inertially confined fusion targetsRaja, Muhammad Mumtaz January 1992 (has links)
No description available.
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Spectral studies of high temperature plasmasHarra, L. K. January 1993 (has links)
No description available.
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Simulation of direct-current surface plasma discharges in air for supersonic flow controlMahadevan, Shankar, 1982- 20 October 2010 (has links)
Computational simulations of air glow discharge plasma in the presence of supersonic flow are presented. The glow discharge
model is based on a self-consistent, multi-species, continuum description of the plasma with finite-rate chemistry effects. The glow discharge model is coupled to a compressible Navier-Stokes solver to study the effect of the plasma on the flow and the counter-effect of the flow on the plasma. A finite-rate air chemistry model is presented and validated against experiments from the literature at a pressure of 600 mTorr. Computational results are compared with experimentally measured V-I characteristics, axial positive ion densities and electron temperature, and reasonably good qualitative and quantitative agreement is observed. The validated air plasma model is then used to study the effect of the surface plasma discharge on M=3 supersonic flow at freestream pressure 18 Torr and the corresponding effects of the flow on the discharge structure in two dimensions. The species concentrations and the gas temperature are examined in the absence and presence of bulk supersonic flow. The peak gas temperature from the computations is found to be 1180 K with the surface plasma alone in the absence of flow, and 830 K in the presence of supersonic flow. Results indicate that O- ions can have comparable densities to electrons in the pressure range 1-20 Torr, and that O2- ion densities are at least two orders of magnitude smaller over the pressure range considered. Different ion species are found to be dominant in the absence and presence of supersonic flow, highlighting the importance of including finite-rate chemistry effects in discharge models for understanding plasma actuator physical phenomena. Electrode polarity effects are investigated, and the cathode upstream actuation is found to be stronger than the actuation strength with the cathode downstream, which is consistent with experimental findings of several groups. A parallel computing implementation of the plasma and flow simulation tools has been developed and is used to study the three-dimensional plasma actuator configuration with circular pin electrodes. / text
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