Dual-Mode Reltron

Author

Soh, Shawn ; Miller, R. Bruce ; Schamiloglu, Edl ; Christodoulou, Christos G.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of New Mexico, Albuquerque, NM, USA

Volume

40

Issue

8

fYear

2012

Firstpage

2083

Lastpage

2088

Abstract

We propose exciting two modes concurrently inside a reltron´s modulating cavity to increase the microwave power generated. From the harmonic components of the beam, we demonstrate that a multiharmonic beam has a higher peak and steeper gradient compared to a single-harmonic beam. We design a modulating cavity and an extraction cavity that are able to excite the TM₀₁₀ mode (2.395 GHz) and TM₁₁₀ (3.579 GHz) modes separately or concurrently. Particle-in-cell simulations show that the total microwave generated for the single TM₀₁₀ mode is 81 MW (efficiency of 23%) and the single TM₁₁₀ mode is 40.5 MW (efficiency of 17%). The total microwave power generated by exciting both modes is 128 MW (efficiency of 35%) and is higher than the power generated by individual modes.

Keywords

electron beams; microwave devices; dual-mode reltron; extraction cavity; frequency 2.395 GHz; frequency 3.579 GHz; harmonic component; microwave power; modulating cavity; multiharmonic beam; particle-in-cell simulation; power 128 MW; power 40.5 MW; power 81 MW; Cavity resonators; Frequency modulation; Harmonic analysis; Iris; Microwave oscillators; Resonant frequency; Electron velocity modulation; modulating cavity; reltron;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2012.2200507

Filename

6222013