NDLI: Magnetic insulation of space-charge dominated beam in a miniature cross-field device

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Magnetic insulation of space-charge dominated beam in a miniature cross-field device

Content Provider	IEEE Xplore Digital Library
Author	Lahav, A. Berezovsky, V. Schachter, L.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel (Lahav, A.; Berezovsky, V.; Schachter, L.)
Abstract	Summary form only given. We report here experimental results from a miniature radiation source based on a ferroelectric cathode. One of the main characteristics of ferroelectric emission at low anode voltages is that the measured current exceeds the Child-Langmuir current by several orders of magnitude. On the other hand, cross field devices, like the magnetron, have inherently high conversion efficiency. It is therefore possible that a low energy cross field oscillator based on a ferroelectric cathode will allow us to investigate the important trade-offs between a space-charge dominated beam and high conversion efficiency. A ferroelectric cathode is used as the electron source in a low energy (<1000 eV) miniature (<0.1 cm/sup 3/) cross-field vacuum diode. Although the current exceeds the estimated Child-Langmuir limit by more than two orders of magnitude, the diode is shown to be insulated by a relatively low magnetic field. Moreover, the cut-off field is controlled primarily by the anode voltage. A model which accounts for the two dimensional nature of the electron flow in the diode has been developed and it reveals the microscopic picture of the flow.
Sponsorship	Motorola Israel Technion Holon Academic Inst. Technol. Tel-Avie Univ. Gordon Center for Energy Studies Jerusalem College of Technol. - Machon Lev Omicron Delta
File Size	40459
File Format	PDF
ISBN	0780376935
DOI	10.1109/EEEI.2002.1178402
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-12-01
Publisher Place	Israel
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic devices Insulation Ferroelectric materials Cathodes Diodes Anodes Low voltage Current measurement Magnetic field measurement Oscillators
Content Type	Text
Resource Type	Article

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