Results 231 to 240 of about 189,484 (267)

Stability of Field Electron Emission and Vacuum Breakdown. Investigations with Field Emission Microscopy and Auger Electron Spectroscopy

Physica Status Solidi (a), 1975
FEM- and AES-investigations show that the long time stability of field emission from metals is determined more by corrosive surface reactions than by simple gas adsorption or cathode sputtering. Corrosion is produced by H2O or organic vapours, but also by CO, even with partial pressures
B. Jüttner, H. Wolff, B. Altrichter
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Emitter for field ionization and field electron emission

International Journal of Mass Spectrometry and Ion Physics, 1983
Abstract An emitter consists of a carrier of metal, e.g. a wire, with protruding crystalline whiskers of a tungsten bronze (ref. 1), (ref. 2). The advantages of these emitters over previously known are: 1. Much thicker wires can be used, 0,1 mm and more in comparison with at most 0,01 mm. 2.
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Electron injection in diodes with field emission

Journal of Applied Physics, 1986
This paper presents self-consistent steady-state solutions of the space charge, transmitted current, and return currents in diodes with electron injection from the cathode and unlimited field emission of electrons and ions from both electrodes. Time-dependent particle simulations of the diode operation confirm the analytical results and show how these ...
Jacques Denavit, George L. Strobel
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The transverse structure of cold field electron emission

Ultramicroscopy, 2010
Solutions of Schrödinger's equation have been obtained for electron emission from a small area in a system of planar electrodes. In a uniform field, wave components with non-zero transverse phase constant see a greater height and width of the potential barrier than the normal component does, the extra energy being that corresponding to the transverse ...
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Field Emission Analytical Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America, 1976
Recently, analytical electron microscopes (AEM), which provide the functions of the transmission electron microscope (TEM), scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS) have been put to practical use with a view to analyzing elements in micro areas, xo improve the performance of this type of AEM, a field emission ...
Y. Harada, Y. Kokubo, T. Goto, N. Tamura, M. Iwatsuki, H. Koike   +5 more
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Electron-optical and emissive characteristics of field emission sources

2010 8th International Vacuum Electron Sources Conference and Nanocarbon, 2010
In the present work, physical and technological aspects that helps in the development of super high brightness thermal field emission electron sources are studied. ZrO/W Schottky cathodes are widely used in various electron probe analytical instruments and units. The normalized brightness (βp) of electron probes formed by electron-optical systems (EOS)
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Photon emission by an electron in a bichromatic field

Physical Review D, 1975
A general expression for the probability of photon emission by an electron in a unidirectional bichromatic classical field is calculated making use of the exact solution to the Dirac equation for the electron in the field. In the limit that one component of the field is weak, a cross section for scattering a photon out of this component is derived ...
R. Guccione-Gush, H. P. Gush
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On the Magnification and Resolution of the Field Emission Electron Microscope

Journal of Applied Physics, 1956
The resolution of the field emission electron microscope is expressed as a function of the ratio of its magnification M to the time-of-flight τ of an electron from emission tip to screen. It is shown that small protrusions on the surface of the tip can provide areas for which M is much greater than that computed for a perfectly smooth tip.
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Field emission in vacuum micro-electronics

Applied Surface Science, 2003
Abstract This review is devoted some aspects of the phenomenon of field electron emission per se, its governing relationships, attainable parameters of the field emission process and its application to problems of vacuum micro-electronics. The field electron emission is also a process capable of initiating and sustaining the generation of high-power
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Electron field emission from carbon

The 13th international winterschool on electronic properties of novel materials- science and technology of molecular nanostructures, 1999
Electron field emission from carbon nanotubes, nano-structured carbon, diamond and diamond-like carbon is reviewed, including experiments, models and applications.
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