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Proceedings Paper

Influence of beam loading on the operation of the relativistic klystron amplifier
Author(s): Moshe Friedman; Victor Serlin; Denis G. Colombant; Jonathan Krall; Yue Ying Lau
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Paper Abstract

Experiments in modulating an electron beam of power greater than 30 GW revealed a mechanism that limits the output RF power of the NRL relativistic klystron amplifier. This mechanism is beam loading of high voltage gaps. It is found that the presence of charge at the gaps is analogous to connecting a capacitor in parallel with the HV gap. This capacitor has a component that depends only on the electron density and on the geometry. Its presence causes detuning of the cavity, resulting in a slow build-up time for the electron beam modulation, saturation of the RF current amplitude and occasionally erratic fluctuations in the RF current. The nonlinear components of this capacitor cause the spectrum of the current modulation to be shifted toward the high frequencies.

Paper Details

Date Published: 1 April 1990
PDF: 10 pages
Proc. SPIE 1226, Intense Microwave and Particle Beams, (1 April 1990); doi: 10.1117/12.18539
Show Author Affiliations
Moshe Friedman, Naval Research Lab. (United States)
Victor Serlin, Naval Research Lab. (United States)
Denis G. Colombant, Naval Research Lab. (United States)
Jonathan Krall, Naval Research Lab. (United States)
Yue Ying Lau, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 1226:
Intense Microwave and Particle Beams
Howard E. Brandt, Editor(s)

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