MULTI-BEAM ELECTRON GUN Russian patent published in 2008 - IPC H01J3/02 H01J23/06 

FIELD: physics.

SUBSTANCE: invention relates to electronic technology, in particular to multi-beam electron guns for powerful multi-beam electro-vacuum microwave devices of O-type, for example, for powerful pulse multi-beam klystrons and TWT. The multi-beam electronic gun contains ring cathodes fixed in the general cartridge clip, electronically isolated from them in the form of a plane-parallel metallic plate with apertures and an anode with apertures. Each of the ring cathodes contains an internal ring core and its coaxially to surrounding ring emitter with a concave spherical emitting surface, turned to the side of the anode. The internal ring core on the side facing the anode has a ledge in the form of the hollow cylinder and the ring groove surrounding it, located coaxially internal ring core. The end of a protrusion is rounded and the apex of the protrusion is combined with a plane, passing through the edge nearest to the controlling electrode of the spherical emitting surface of the ring emitter, the internal diameter of the protrusion is equal to internal diameter of the internal ring core, the external diameter of the protrusion is equal to internal diameter of the ring groove, the external diameter of the internal ring core is equal to the internal diameter of the ring emitter, thus distance H from the base of the groove to the top of the protrusion, the external diameter D2 of the protrusion, the rounded radius R of the protrusion, the external diameter D3 of a ring groove are determined by the set conditions.

EFFECT: simplification of the design of a multi-beam electron gun, increase in the dielectric strength, stability and reliability of its work in powerful pulse multi-beam devices of short-wave area of the microwave band.

2cl, 7dwg