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 14 of 14 for “"strong electric field"”.
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Investigation of dense plasma under a strong electric field
… temperature ~ 200 eV has been investigated under electric fields of 100 to 500 V/cm. A pinch of pinch ratio ~ 3 was found to be hydrodynamically stable for ~ 2~s during which the experiment was performed. A sharp burst of runaway electrons of total current of the order of amperes occured and …
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Photoionization of excited states of atomic hydrogen in a strong electric field
… of excited states of atomic hydrogen in a strong external electric field is examined theoretically and experimentally. A theoretical treatment which predicts novel effects in the excitation of the broad resonant states in the continuum from pure parabolic Stark states is presented. The …
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The Correlation Between Electrical Pulses and Light Flashes in a Proportional Counter.
… molecules along its path. In the presence of a strong electric field, the electrons and ions are swept toward the collecting electrodes. The electric field strength is adjusted to a value such that the electrons on their way to the positive electrode cause further ionization. The total charge …
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Microfluidic flow-focusing device for the electrospinning of hollow polymer nanofibers
… and can be customized into matrices with special electrical, optical and biological properties. Electrospinning, which utilizes the destabilization of a fluid's surface in a strong electric field, has gained the most favor as a top-down approach to producing polymer nanofibers. In this work, a …
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Applications of Field-Evaporation Theory
… atoms from a surface under the influence of a strong electric field. The theory of field evaporation under discussion, put forward by Forbes, assumes that the shape of the atomic bonding-well is parabolic and also that a Gomer-type mechanism operates. When this theory is combined with a …
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ELECTROSTATIC SEPARATION OF SUPERCONDUCTING PARTICLES FROM NON-SUPERCONDUCTING PARTICLES AND IMPROVEMENT IN FUEL ATOMIZATION BY ELECTRORHEOLOGY
… basic science research, the interactions between electric field and superconductors, we have developed a new technology, which can separate superconducting granular particles from their mixture with non-superconducting particles. The electric-field induced formation of superconducting balls is …
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Hybrid plasma-semiconductor devices
… electrons and ions in the gaseous plasma with a strong electric field yields a transistor with photosensitivity, gain, and a light-emitting collector whose radiative output can be modulated or switched using voltages that are less than 1 V. It has been found that the current gain of the …
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Transport in nanoscale systems
… Phase diagram is studied by means of the height field order parameter. Novel correlated fluid phase is identified, in which transport of classical charges exhibits correlated behavior. Freezing transitions into commensurate ground state configurations are found to be of the first order. A novel …
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Nanowire sharpening : application to field ionization
Nanowires show potential for a wide range of fields, from developing next generation solar cells, to detecting viruses, to field ionizing gasses. Their uses in such disparate fields are due to the extreme flexibility in which nanowires can be manufactured and customized to order. The heart of a …
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Modeling edge effects of mesa diodes for silicon photovoltaics
… model for carrier dynamics coupled with electric potential determined from Poisson's equation. The purpose of these simulations has been to determine the influence of edge conditions on the overall performance of mesa diodes under dark and illuminated conditions. Mesa diode arrays are …
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Parallel nano-manufacturing via electro-hydrodynamic jetting from externally-fed emitter arrays
… low flow rates through a syringe needle in a strong electric field. The emitted charged jet is stretched and whipped extensively creating fibers with diameters as small as tens of nanometers. Existing approaches to increase throughput via multiplexing of jets are either too complex to scale up …
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Finite drift orbit effects in a tokamak pedestal
… obtained this result, we next deduce that a strong electric field is inherently present in a subsonic pedestal to sustain ion pressure balance, making the ExB drift enter the leading order streaming operator in the kinetic equation. We proceed by analyzing novel features that the existence of …
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Ionic Self-Assembled Multilayers in a Long Period Grating Sensor for Bacteria and as a Source of Second-Harmonic Generation Plasmonically Enhanced by Silver Nanoprisms
… half its wavelength in the presence of intense electric fields. Localized surface plasmons (LSPs) in metal nanoparticles produce strong electric field enhancements, especially at sharp tips and edges, that can be used to increase SHG. Colloidally grown silver nanoprisms were deposited onto …
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NEUTRON SCATTERING STUDIES OF CRUDE OIL VISCOSITY REDUCTION WITH ELECTRIC FIELD
… size, neutrons are capable of interacting strongly with all atoms. This is in contrast to X-ray techniques where the X-rays interact weakly with hydrogen, the most abundant element in most samples. The SANS refractive index is directly related to the scattering length density and is a …