Microwave amplification with an intense relativistic electron beam

A linear microwave amplifier has been constructed using an intense relativistic electron beam (5 kA, 1.2 MV) as the active medium. Stable amplification of an externally applied 100-kW signal at ∼ 3-cm wavelength has been demonstrated with a spatial growth rate of 1 dB/cm and an over-all gain in this...

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Veröffentlicht in:J. Appl. Phys., v. 46, no. 9, pp. 3800-3805 v. 46, no. 9, pp. 3800-3805, 1975-09, Vol.46 (9), p.3800-3805
Hauptverfasser: Granatstein, V. L., Sprangle, P., Herndon, M., Parker, R. K., Schlesinger, S. P.
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container_issue 9
container_start_page 3800
container_title J. Appl. Phys., v. 46, no. 9, pp. 3800-3805
container_volume 46
creator Granatstein, V. L.
Sprangle, P.
Herndon, M.
Parker, R. K.
Schlesinger, S. P.
description A linear microwave amplifier has been constructed using an intense relativistic electron beam (5 kA, 1.2 MV) as the active medium. Stable amplification of an externally applied 100-kW signal at ∼ 3-cm wavelength has been demonstrated with a spatial growth rate of 1 dB/cm and an over-all gain in this single-stage device of 16 dB. The amplifier appears to be a very wide band device having a bandwidth extending over several gigahertz. The measured characteristics of the amplifier have been compared with theoretical predictions for the relativistic electron cyclotron instability. Measurements of both the variation of amplifier gain with magnetic field strength and the linear spatial growth rate are in reasonable agreement with theoretical predictions.
doi_str_mv 10.1063/1.322166
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subjects 700108 -Fusion Energy-Plasma Research-Plasma Wave Phenomena
CYCLOTRON INSTABILITY
ELECTRON BEAMS
GAIN
INSTABILITY GROWTH RATES
MAGNETIC FIELDS
MICROWAVE AMPLIFIERS- RELATIVISTIC PLASMA
N70900 -Physics-Controlled Thermonuclear Research-Wave Phenomena
RELATIVISTIC RANGE
title Microwave amplification with an intense relativistic electron beam
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