An Improved Small-Signal Theory of the Triaxial Klystron Amplifier in the Dispersion Relation and Beam Coupling Coefficient

Author

Qi, Zumin ; Zhang, Jun ; Zhong, Huihuang ; Zhang, Zhehai ; Bai, Xianchen ; Zhang, Dian ; Bai, Zhen

Author_Institution

Coll. of Opto-Electr. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

Volume

40

Issue

1

fYear

2012

Firstpage

41

Lastpage

47

Abstract

An improved small-signal theory of triaxial klystron amplifiers is proposed with a reduction factor and the beam coupling coefficient being taken into account. It may be concluded that the beam coupling coefficient amends the amplitude of the modulated current and the reduction factor mainly modifies the optimum drift distance, at which the modulated current is maximum. The modified theory is validated by means of PIC codes, which indicates that the improved theory predicts the first-order modulation current more accurately than the previous theory.

Keywords

amplifiers; dispersion relations; klystrons; PIC codes; beam coupling coefficient; dispersion relation; first-order modulation current; small-signal theory; triaxial klystron amplifier; Cavity resonators; Conductors; Couplings; Dispersion; Klystrons; Modulation; Beam coupling coefficient; dispersion relation; small-signal theory; space-charge wave; triaxial klystron amplifier (TKA);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2172639

Filename

6074951