Design of a 3-MW 140-GHz gyrotron with a coaxial cavity

Author

Read, M.E. ; Nusinovich, Gregory S. ; Dumbrajs, O. ; Bird, G. ; Hogge, P. ; Kreischer, Kenneth ; Blank, Monica

Author_Institution

Physical Sci. Inc., Alexandria, VA, USA

Volume

24

Issue

3

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

586

Lastpage

595

Abstract

A design for a 3-MW 140-GHz gyrotron based on the use of a coaxial cavity is given. The cavity mode is TE_21,13, chosen so that the ohmic heating on both the inner and outer conductors would be low enough for CW operation. The mode selection process, nonlinear, multimode and time-dependent modeling of the beam wave interaction, and gun design are discussed in detail. An inverted magnetron injection gun (MIG) is used to accommodate the inner conductor. The radiation is coupled out via a quasi-optical mode converter, consisting of an irregular cylindrical waveguide section followed by a step-cut launching aperture and a single near-parabolic mirror. The design of these components is also described

Keywords

cavity resonators; circular waveguides; electron guns; gyrotrons; magnetrons; millimetre wave tubes; modelling; 140 GHz; 3 MW; CW operation; TE_21,13 cavity mode; beam wave interaction; coaxial cavity; design; gun design; gyrotron; inner conductors; inverted magnetron injection gun; irregular cylindrical waveguide section; mode selection process; multimode modeling; nonlinear modeling; ohmic heating; outer conductors; quasi-optical mode converter; single near-parabolic mirror; step-cut launching aperture; time-dependent modeling; Apertures; Birds; Coaxial components; Conductors; Electrons; Frequency; Gyrotrons; Heating; Mirrors; Senior members;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.532941

Filename

532941