Concepts and present status for multi-mode quasi-optical converters in gyrotrons

Author

Denisov, G.G. ; Bogdashov, A.A. ; Chirkov, A.V. ; Pavel´ev, A.B.

Author_Institution

Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia

fYear

2004

fDate

27 Sept.-1 Oct. 2004

Firstpage

483

Lastpage

484

Abstract

It is a demand and a challenge for high-power microwave electronics to develop a megawatt power level gyrotron capable to operate at several modes and correspondingly at several frequencies. The main approaches for designing effective converters of a set of operating modes into a paraxial wave beam are discussed. Two main principles: "pre-shaping" of the wave beam before its launching from the waveguide end and near-confocal mirror optics are considered and their limitations studied.

Keywords

gyrotrons; millimetre wave frequency convertors; millimetre wave tubes; mirrors; waveguides; 140 GHz; high power microwave electronics; megawatt power level gyrotron; multimode quasioptical converters; near confocal mirror optics; paraxial wave beam; wave beam preshaping; waveguide; Electron tubes; Frequency; Gyrotrons; Magnetic fields; Mirrors; Optical losses; Optical pumping; Optical scattering; Optical surface waves; Optical waveguides;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on

Print_ISBN

0-7803-8490-3

Type

conf

DOI

10.1109/ICIMW.2004.1422174

Filename

1422174