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25 July 1989 High Power Traveling Wave Amplifier Experiments
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Several high power X band traveling wave amplifiers (TWA) have been fabricated and tested. The tubes have gains ranging from 13dB to 29dB at 8.76 GHz, and output powers ranging from 3 to 100 MW. The amplifiers are driven by the interaction of a slow space charge wave on an electron beam with an electromagnetic wave supported by the structure. The electron beam has an energy of 850 keV, and currents in the 1 kA range. The amplifiers operate over a narrow range of frequencies which increases slowly with the length of the structure. The gain of the amplifiers increases rapidly with the beam current and with increases in the structure length. No evidence of oscillation in higher order modes has been found. We summarize in this paper the main features of the amplifiers.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John A. Nation, D. Shiffler, J. D. Ivers, and G. Kerslick "High Power Traveling Wave Amplifier Experiments", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989);

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