Surface Preparation of Electrodes for Studies of the Electrical Properties of Dielectrics

Hawley, R.; Zaky, A. A.; Eldine, M. E. Zein

doi:10.1038/200060a0

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…where the proportionality constant C is a function of the electrode material and finish as well as the ambient conditions of temperature, pressure, etc. [8]. From an analysis of published data, it appears that the breakdown voltage is linearly proportional to the gap spacing up to some critical value, above which the relationship per Eq.…”

Section: Elementary Extractionmentioning

confidence: 99%

A 225-MW neutral injection system for a mirror fusion-fission hybrid reactor

Fink¹,

Barr

Hamilton

1975

Nucl. Fusion

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As part of a study for a mirror fusion-fission hybrid reactor, a preliminary design for a 225-MW neutral beam injector of fast deuterium atoms at 100 kV and fast tritium atoms at 150 kV was prepared. The injector layout consists of four assemblies, each comprising 70 ion-source modules mounted in a converging array. An efficient, long-lifetime cathode for the plasma sources is proposed. The requirements for ion extraction and acceleration are satisfied by a two-stage acceldecel-accel-decel grid system designed to operate within the limitations imposed by beam space charge, beam optics, voltage breakdown, and grid bombardment by secondary ions and electrons. A low-temperature neutralizing cell followed by a system for recovery of the energy of the unneutralized fraction of the beam has been designed to provide an overall injector power efficiency greater than 70%. To maintain required pressures within the acceleration assemblies, the neutralizers, the beam energy recovery systems, and the beam line itself, pumping systems capable of handling a total gas flow of 2400 Torr'litres" are required. Problems associated with magnetic shielding of the ion source assemblies from the reactor fringing field as well as the mounting of the accel-decel grids at high voltage and high temperature are evaluated. * Work performed under the auspices of the United States Energy Research and Development Administration. T On loan from Westinghouse Corporation. Cryopumpingchamber-85m (280 1 ) diam. Crane- Uranium blanketmodules 1n withdrawn positio .Cryopumping chambers One-stage direct converter Vacuum line to mechanical pumps Module cart' Lead casket for uranium blanket module Helium manifolds to steam generators Main superconducting" coils One-stage direct converter Support 'structure for shielding & module cart tracks Scale: Metres FIG.l. Vertical cross-section through reactor. In the plane normal to the section shown, the sources are stacked 14 deep (in a 700-cm span) and provide a beam which focuses at 60°.

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Section: Elementary Extractionmentioning

confidence: 99%

A 225-MW neutral injection system for a mirror fusion-fission hybrid reactor

Fink¹,

Barr

Hamilton

1975

Nucl. Fusion

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“…In addition, the applications of field diffusion matrices for flat plates, electron multipliers and microelectronics were extensively studied. [6,7]. Local increase of the electric field at the cathode surface leads to diffusion in the microprojects of that surface.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Field Emission from Laser Etched Porous Silicon

H.R¹

2022

KJS publishes peer-review articles in Mathematics, Computer Sci

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In many modern sciences, electron transfer is required, such as electron microscopes, microwaves, and screens. There have been numerous reports of the formation of microstructures on silicon surfaces using lasers in halogen-containing media and their optical, electrical and other physical properties. A silicon microstructured field emitter is modeled with Fowler-Nortium field diffusion theory, and the breakdown currents are consistent. Breakdown voltage, field gain coefficient, current and current density, and emitter region (in case of breakdown) are considered in the simulation. Comparison between simulation and experimental results shows that the microstructure has field emitter properties and can be used as a new field emitter.

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Gesteinsparameter

Grissemann¹

1972

Geoelektronik

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Surface Preparation of Electrodes for Studies of the Electrical Properties of Dielectrics

Cited by 4 publications

References 5 publications

A 225-MW neutral injection system for a mirror fusion-fission hybrid reactor

A 225-MW neutral injection system for a mirror fusion-fission hybrid reactor

Modeling of Field Emission from Laser Etched Porous Silicon

Gesteinsparameter

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