MAGNETRON-TYPE ELECTRON GUN FOR GENERATING HELICAL ELECTRON BEAMS WITH REFLECTED ELECTRON TRAP Russian patent published in 2014 - IPC H01J23/06 

FIELD: physics.

SUBSTANCE: invention relates to electron guns of flight-type devices with tubular electron flow, coaxial to the axis of a resonator, e.g. gyrotrons. In an electron gun, having an axially symmetric cathode with an emitting band, an anode and a reflected electron trap, each trap electrode is in form of a helical edge, and the cathode is equipped with a cylindrical ferrule, the length of which is not less than the length of the edge of the trap.

EFFECT: high efficiency of generating microwave radiation owing to that the electron gun for generating helical electron beams with a reflected electron trap enables to capture each electron reflected from a magnetic plug at the first reflection from the magnetic plug.

5 cl, 6 dwg