High power microwave generation from plasma-filled backward-wave oscillators

W. W. Destier; Y. Carmel; V. L. Granatstein; K. Minami; D. Abe; W. R. Lou; R. A. Kehs

doi:10.1117/12.951764

High power microwave generation from plasma-filled backward-wave oscillators

W. W. Destier, Y. Carmel, V. L. Granatstein, K. Minami, D. Abe, W. R. Lou, R. A. Kehs

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1 Scopus citations

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.

Original language	English
Pages (from-to)	10-16
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	1061
DOIs	https://doi.org/10.1117/12.951764
State	Published - 25 Jul 1989
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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title = "High power microwave generation from plasma-filled backward-wave oscillators",

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.",

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AU - Destier, W. W.

AU - Carmel, Y.

AU - Granatstein, V. L.

AU - Minami, K.

AU - Abe, D.

AU - Lou, W. R.

AU - Kehs, R. A.

PY - 1989/7/25

Y1 - 1989/7/25

N2 - 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.

AB - 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.

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High power microwave generation from plasma-filled backward-wave oscillators

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