Optimization of a Sheet Electron Beam Interaction With a Slow Wave

Author

Pchelnikov, Yuriy N. ; Yelizarov, Andrey A.

Author_Institution

Sci. Applic. Int. Corp., McLean, VA, USA

Volume

61

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

1661

Lastpage

1665

Abstract

A simple planar circuit model consisting of impedance and screen electrodes is used to analyze the strength of the interaction of a sheet electron beam with the in-phase slow-wave mode of the circuit. The impedance approximation is used to represent the fields of E- and H-waves by the zero and ±1 space harmonics. A new generalized formula for the coupling coefficient characterizing the interaction strength is used to demonstrate its dependence on the thickness of the sheet beam and the distance between the impedance and screen electrodes. A comparison between the coupling coefficients calculated for sheet and cylindrical beams shows the significant advantage of the sheet beam configuration.

Keywords

approximation theory; electrodes; electron beams; slow wave structures; E-waves; H-waves; coupling coefficient; impedance approximation; impedance electrodes; in-phase slow-wave mode; interaction strength; screen electrodes; sheet beam; sheet electron beam interaction; simple planar circuit; slow wave; space harmonics; Approximation methods; Couplings; Electrodes; Electron beams; Electron tubes; Harmonic analysis; Impedance; Coupling coefficient; impedance electrodes; interaction; sheet electron beam (EB); traveling-wave tube (TWT); traveling-wave tube (TWT).;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2013.2296563

Filename

6709810