Nonlinear theory of gyrotwystrons with stagger-tuned cavities

Author

Chen, Wenjun ; Nusinovich, Gregory S. ; Granatstein, Victor L.

Author_Institution

Lab. for Plasma Res., Maryland Univ., College Park, MD, USA

Volume

27

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

429

Lastpage

437

Abstract

A nonlinear theory is developed to study the effects of stagger tuning on the gain and the bandwidth of stagger-tuned gyrotwystrons operating in the large-signal regime. The assumption that prebunching cavities are short and therefore the electron bunching proceeds mainly in the drift regions allows us to use a simple point-gap model of the prebunching section to study this problem. Studies of gyrotwystrons with one- and two-prebunching stagger-tuned cavities have been carried out in the large-signal, saturation regime and show that two-cavity gyrotwystrons are preferred over one-cavity gyrotwystrons for significantly larger gain, bandwidth and gain-bandwidth product. The comparison of our results with a previous gyrotwystron design shows good agreement and validates our model

Keywords

cavity resonators; gyrotrons; tuning; bandwidth; drift regions; electron bunching; gain; gain-bandwidth product; gyrotwystrons; large-signal regime; nonlinear theory; point-gap model; prebunching cavities; saturation regime; stagger-tuned cavities; two-cavity configuration; Bandwidth; Electromagnetic waveguides; Electron beams; Frequency; Gain; Geometry; Helium; Klystrons; Tuning; Waveguide theory;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.772270

Filename

772270