Coupled-cavity monotron

Author

Barroso, Joaquim J.

Author_Institution

Nat. Inst. for Space Res.-INPE, St. José dos Campos, Brazil

fYear

2011

fDate

21-24 Feb. 2011

Firstpage

277

Lastpage

278

Abstract

We demonstrate that on considering an electric-field longitudinal profile in the shape of a two-level transition curve the monotron conversion efficiency can attain values in excess of 30%, 1.5 times as high as that obtained from the conventional uniform field distribution. This is accomplished by using two cavities electromagnetically coupled by an annular slit crossed by an electron stream. A two-cavity monotron is developed to operate in the TM₀₂₀ mode at 6.6 GHz when self-excited by a 20 keV, 50 A hollow electron beam. The device operation is examined through a 2 1/2-D particle-in-cell (PIC) simulation giving a 33.0% conversion efficiency.

Keywords

electric fields; electromagnetic coupling; electron beams; microwave generation; microwave tubes; TM₀₂₀ mode; annular slit; coupled-cavity monotron; current 50 A; efficiency 33 percent; electric-field longitudinal profile; electron stream; electron volt energy 20 keV; frequency 6.6 GHz; monotron conversion efficiency; particle-in-cell simulation; uniform field distribution; annular electron beam; coupled cavities; microwave generation; monotron; transit-time tubes;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2011 IEEE International

Conference_Location

Bangalore

Print_ISBN

978-1-4244-8662-5

Type

conf

DOI

10.1109/IVEC.2011.5746983

Filename

5746983