Gain and efficiency studies of a high-power traveling-wave-tube amplifier

Donald A. Shiffler; John A. Nation; J. D. Ivers; G. Kerslick

doi:10.1117/12.18540

1 April 1990 Gain and efficiency studies of a high-power traveling-wave-tube amplifier

Donald A. Shiffler, John A. Nation, J. D. Ivers, G. Kerslick

Proceedings Volume 1226, Intense Microwave and Particle Beams; (1990) https://doi.org/10.1117/12.18540
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

The results of measurements on the gain and efficiency of a high power travelling wave tube amplifier powered by a 850 keV, 0.8-1.6 kA, 100 nsec pencil electron beam are reported. The amplifier operates in the TM01 mode and is driven by a 250 kW magnetron. Gains of up to 35 dB and efficiencies of 11 percent have been achieved in a single stage amplifier with a power output of about 100 MW. Increases in the gain beyond 35 dB result in a driven oscillation due to positive feedback from a small impedance mismatch at the output. A two stage severed amplifier has also been developed to prevent the driven oscillation. Preliminary results indicate that the severed amplifier has a peak power output of 400 MW and an efficiency of over 40 percent.

Citation Download Citation

Donald A. Shiffler, John A. Nation, J. D. Ivers, and G. Kerslick "Gain and efficiency studies of a high-power traveling-wave-tube amplifier", Proc. SPIE 1226, Intense Microwave and Particle Beams, (1 April 1990); https://doi.org/10.1117/12.18540

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