skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental research of different plasma cathodes for generation of high-current electron beams

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.

Authors:
; ; ; ;  [1]; ; ;  [2];  [2]
  1. Physics Department, Technion, Haifa 32000 (Israel)
  2. Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, Tomsk 634055 (Russian Federation)
Publication Date:
OSTI Identifier:
22492939
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; CATHODES; CURRENT DENSITY; ELECTRIC POTENTIAL; ELECTRON BEAMS; EMISSION; EPOXIDES; EROSION; GRAPHITE; MAGNETIC FIELDS; PLASMA; PULSES; RODS

Citation Formats

Shafir, G., Kreif, M., Gleizer, J. Z., Gleizer, S., Krasik, Ya. E., Gunin, A. V., Kutenkov, O. P., Rostov, V. V., Pegel, I. V., and Tomsk Polytechnic University, Tomsk 634034. Experimental research of different plasma cathodes for generation of high-current electron beams. United States: N. p., 2015. Web. doi:10.1063/1.4935880.
Shafir, G., Kreif, M., Gleizer, J. Z., Gleizer, S., Krasik, Ya. E., Gunin, A. V., Kutenkov, O. P., Rostov, V. V., Pegel, I. V., & Tomsk Polytechnic University, Tomsk 634034. Experimental research of different plasma cathodes for generation of high-current electron beams. United States. doi:10.1063/1.4935880.
Shafir, G., Kreif, M., Gleizer, J. Z., Gleizer, S., Krasik, Ya. E., Gunin, A. V., Kutenkov, O. P., Rostov, V. V., Pegel, I. V., and Tomsk Polytechnic University, Tomsk 634034. Sat . "Experimental research of different plasma cathodes for generation of high-current electron beams". United States. doi:10.1063/1.4935880.
@article{osti_22492939,
title = {Experimental research of different plasma cathodes for generation of high-current electron beams},
author = {Shafir, G. and Kreif, M. and Gleizer, J. Z. and Gleizer, S. and Krasik, Ya. E. and Gunin, A. V. and Kutenkov, O. P. and Rostov, V. V. and Pegel, I. V. and Tomsk Polytechnic University, Tomsk 634034},
abstractNote = {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.},
doi = {10.1063/1.4935880},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 19,
volume = 118,
place = {United States},
year = {2015},
month = {11}
}