Title :
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
fDate :
6/1/1996 12:00:00 AM
Abstract :
A design for a 3-MW 140-GHz gyrotron based on the use of a coaxial cavity is given. The cavity mode is TE21,13, 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; TE21,13 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;
Journal_Title :
Plasma Science, IEEE Transactions on
