Title :
Theory of intermodulation in a klystron
Author :
Lau, Y.Y. ; Chernin, David P. ; Wilsen, Craig ; Gilgenbach, Ronald M.
Author_Institution :
Dept. of Nucl. Eng. & Radiol. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
A general theory of intermodulation in klystron amplifiers is presented. The formulation leads directly to the first algorithm for the computation of intermodulation products of all orders, including harmonic generation, at each gap in a multicavity klystron. The theory assumes one-dimensional (1-D) motion only, but takes explicitly into account all dynamical and space charge effects in 1-D to all orders in the modulation strength, including the combined effects of ballistic bunching and space-charge force. The theory reproduces the standard klystron results in the limit of a single-frequency input signal. A central result of the analysis is the derivation of a general expression for the current modulation in a drift tube, in terms of the velocity modulation of arbitrary temporal variation that is imposed at an upstream location
Keywords :
harmonic generation; intermodulation; klystrons; microwave amplifiers; ballistic bunching; current modulation; drift tube; dynamical effects; harmonic generation; intermodulation; klystron amplifiers; multicavity klystron; one-dimensional motion; single-frequency input signal; space charge effects; space-charge force; temporal variation; upstream location; velocity modulation; Electron beams; Frequency conversion; Genetic expression; Klystrons; Narrowband; Nuclear electronics; Power system harmonics; Signal design; Signal generators; Space charge;
Journal_Title :
Plasma Science, IEEE Transactions on
