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Proceedings Paper

Low-frequency cavity oscillation driven by detuned current modulation
Author(s): Han Sup Uhm
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Paper Abstract

A theoretical model of cavity excitation driven by a modulated electron beam is developed in connection with application to relativistic klystron amplifiers. The equations that govern the phase and amplitude of the excitation voltage appearing on the cavity opening are obtained in terms of time t and current modulation strength. Several points are noteworthy: (1) amplitude and phase shift of the induced voltage indicate a damping oscillation, whose frequency is proportional to the mismatch (Delta) (omega) between the modulation frequency (omega) and the cavity resonance frequency (omega) 0; (2) rise time of the cavity excitation amplitude decreases as the value of the frequency mismatch increases; (3) for a large value of the frequency mismatch (Delta) (omega) , the power transfer from the modulated beam to the cavity occurs at the beginning of the beam pulse; and (4) it is observed that the absolute amount of energy delivered from the beam to the cavity decreases drastically as the frequency mismatch increases.

Paper Details

Date Published: 13 May 1994
PDF: 10 pages
Proc. SPIE 2154, Intense Microwave Pulses II, (13 May 1994);
Show Author Affiliations
Han Sup Uhm, Naval Surface Warfare Ctr. (South Korea)

Published in SPIE Proceedings Vol. 2154:
Intense Microwave Pulses II
Howard E. Brandt, Editor(s)

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