Modeling of T-shaped vane loaded helical slow-wave structures

Author

Zhu, Xiao Fang ; Yang, Zhong Hai ; Li, Bin

Author_Institution

Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu

Volume

34

Issue

3

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

563

Lastpage

571

Abstract

In this paper, the finite-size vane (FSV) sheath-helix model is proposed to calculate the cold-test characteristics of T-shaped vane loaded helical slow-wave structures (SWSs), in which the effects of the finite number and dimensions of the T-shaped vanes are taken into account, and also the angular harmonics generated due to the angular periodicity of the vanes are considered. Based on this model, the dispersion relation and the interaction impedance are derived and then are applied to an actual structure. The theoretical predictions are also compared with the MAFIA simulation results, and the error are analyzed and interpreted. In the end, the influences of the inner radius and inner width of the T-shaped vanes on the cold-test characteristics are illustrated

Keywords

dispersion relations; slow wave structures; MAFIA simulation; T-shaped vane loaded structures; angular harmonics; angular periodicity; cold-test characteristics; dispersion relation; helical slow-wave structures; interaction impedance; sheath-helix model; Analytical models; Blades; Character generation; Dielectrics; Dispersion; Error analysis; Harmonic analysis; Impedance; Predictive models; Vacuum technology; Cold-test characteristics; MAFIA simulation; T-shaped vane; helical slow-wave structure; traveling-wave tubes;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2006.874847

Filename

1643277