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Proceedings Paper

High Power Microwave Generation From Plasma-Filled Backward-Wave Oscillators
Author(s): W. W. Destler; Y. Carmel; V. L. Granatstein; K. Minami; D. Abe; W. R. Lou; R. A. Kehs
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Paper Abstract

Experimental and theoretical studies of high power microwave generation from three different plasma-filled backward-wave oscillator (BWO) configurations are reported. In the first, a neutral fill gas inside the BWO slow wave structure is ionized by the electron beam and a resonant enhancement of microwave output is observed at optimum values of fill gas pressure and applied axial magnetic field. In the second, a low energy electron beam is used to preionize the fill gas in advance of electron beam injection. In the third configuration, plasma is injected into the slow wave structure in advance of beam injection using a Marshall plasma gun. A fivefold increase in microwave output power and efficiency is observed in this case. Possible theoretical explanations for the observed interaction enhancement are also discussed.

Paper Details

Date Published: 25 July 1989
PDF: 7 pages
Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); doi: 10.1117/12.951764
Show Author Affiliations
W. W. Destler, University of Maryland (United States)
Y. Carmel, University of Maryland (United States)
V. L. Granatstein, University of Maryland (United States)
K. Minami, University of Maryland (United States)
D. Abe, University of Maryland (United States)
W. R. Lou, University of Maryland (United States)
R. A. Kehs, Harry Diamond Laboratories (United States)

Published in SPIE Proceedings Vol. 1061:
Microwave and Particle Beam Sources and Directed Energy Concepts
Howard E. Brandt, Editor(s)

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