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Showing 1 to 20 of 77 for “"Electron emission"”.
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Secondary Electron Emission of Liquid Insulators
Made available in DSpace on 2014-12-08T22:24:45Z (GMT). No. of bitstreams: 1 7013299.pdf: 2113801 bytes, checksum: 73ae609c90132eab607f6518c534e29f (MD5) Previous issue date: 1969
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The Time Dispersion of Secondary Electron Emission
Made available in DSpace on 2014-12-04T21:02:43Z (GMT). No. of bitstreams: 1 0011504.pdf: 4327321 bytes, checksum: 243e5582e982761d86a45d5e21eb4e49 (MD5) Previous issue date: 1955
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Encapsulated source contact dose estimates incorporating secondary electron emission
Secondary electron emission generated at the surface of thin material from interaction with gamma rays form a significant component of the surface dose. The intensity of this emission is known to vary with material composition and incident radiation energies. The goal of this research effort is to …
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Electroforming and electron emission in metal-borosilicate glass-metal structures
… show electroforming effects and subsequently electron emission, voltage-controlled negative resistance, electroluminescence, and switching phenomena. Previous work in this field is reviewed. By making certain modifications to the filamentary conduction theory of Dearnaley, the time dependence …
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Spectroscopic studies of field-induced electron emission from isolated microstructures
… has been undertaken into the field induced electron emission (FIEE) mechanism that occurs at microscopically localised `sites' on uncoated and dielectric coated metallic electrodes. These processes have been investigated using two dedicated experimental systems that were developed for this …
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Low-Energy Ion-Induced Electron Emission From Gas-Covered Surfaces
Made available in DSpace on 2017-07-06T18:58:52Z (GMT). No. of bitstreams: 3 Smith_Preston_C_MS.pdf: 61120463 bytes, checksum: df566e04c668e5a6496ab1f6313f7f18 (MD5) Smith_Preston_C_MS_ABS.pdf: 518259 bytes, checksum: 671c65d1b7ed866c15d648a53791c24b (MD5) license.txt: 4813 bytes, checksum: …
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Non-metallic cold-cathode electron emission from composite metal-insulator microstructures
… has been undertaken into a field-induced electron emission (FIEE) mechanism that occurs at microscopically localised `sites' on uncoated, dielectric-coated and composite-coated metallic cathodes. An optical imaging technique has been used to observe and characterize the spatial and …
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An analytical framework for field electron emission, incorporating quantum- confinement effects
As field electron emitters shrink to nanoscale dimensions, the effects of quantum confinement of the electron supply and electric field enhancement at the emitter tip play a significant role in determining the emitted current density (ECD). Consequently, the Fowler-Nordheim (FN) equation, which …
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Theory and modeling of field electron emission from low-dimensional electron systems
… have succeeded in fabricating nanoscale field electron emitters in a variety of geometries and materials for use as electron sources in vacuum nanoelectronic devices, theory and modeling of field electron emission have not kept pace. Treatments of field emission which address individual …
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The Self-Sustaining Processes in a Hollow Cathode to Produce a Steady Electron Emission
… The two major characteristics are that the electron emission of the cathode reaches a self-sustaining mode, ion bombardment of the low work-function materials. This research proposes the theory that the self-sustaining mode is a complex result of a mix of ionization states (singly, doubly, …
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The Physical Origin of Pre-Breakdown Electron Emission From Broad-Area High Voltage Electrodes
… been undertaken into the nature of the localised electron emission sites which cause pre-breakdown conduction between broad area electrodes separated by short ultra high vacuum gaps. A new automated specimen scanner and an electron imaging technique have shown that emission sites are composed of …
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The Electron Emission Characteristics of Aluminum, Molybdenum and Carbon Nanotubes Studied by Field Emission and Photoemission.
The electron emission characteristics of aluminum, molybdenum and carbon nanotubes were studied. The experiments were setup to study the emission behavior as a function of temperature and exposure to oxygen. Changes in the surface work function as a result of thermal annealing were monitored with …
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Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact
Monte Carlo simulations of secondary electron emission from thin metal foils after fast proton impact require reliable interaction cross sections with the target under consideration. Total and energy differential inelastic cross sections have been derived for aluminum, copper, and gold thin-metal …
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A Study of High Energy-Resolution and at Low Primary Energies of the Secondary Electron Emission From (100) Tungsten
Made available in DSpace on 2015-05-12T21:41:39Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6706698.PDF: 3471754 bytes, checksum: 55771bb48e63d8dd7ed8d16ef08a4168 (MD5) Previous issue date: 1966
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