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Author Shafir, G. ♦ Kreif, M. ♦ Gleizer, J. Z. ♦ Gleizer, S. ♦ Krasik, Ya. E. ♦ Gunin, A. V. ♦ Kutenkov, O. P. ♦ Rostov, V. V. ♦ Pegel, I. V.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ AMPLITUDES ♦ CATHODES ♦ CURRENT DENSITY ♦ ELECTRIC POTENTIAL ♦ ELECTRON BEAMS ♦ EMISSION ♦ EPOXIDES ♦ EROSION ♦ GRAPHITE ♦ MAGNETIC FIELDS ♦ PLASMA ♦ PULSES ♦ RODS
Abstract The results of experimental studies of different types of cathodes—carbon-epoxy rods, carbon-epoxy capillary, edged graphite, and metal-dielectric—under the application of high-voltage pulses with an amplitude of several hundreds of kV and pulse duration of several nanoseconds are presented. The best diode performance was achieved with the edged graphite and carbon-epoxy-based cathodes characterized by uniform and fast (<1 ns) formation of explosive emission plasma spots and quasi-constant diode impedance. This result was achieved for both annular cathodes in a strong magnetic field and planar cathodes of a similar diameter (∼2 cm) with no external magnetic field. The cathodes based on carbon-epoxy rods and carbon-epoxy capillaries operating with an average current density up to 1 kA/cm{sup 2} showed insignificant erosion along 10{sup 6} pulses of the generator and the generated electron beam current showed excellent reproducibility in terms of the amplitude and waveform.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-11-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 19


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