High-power high-convergence electron gun for an 11.424-GHz pulsed magnicon

This paper describes the design and testing of an ultrahigh-convergence electron gun that was developed for a high-power X-band magnicon amplifier. The gun operates at an area compression ratio of 1400:1 to produce a /spl sim/500-kV /spl sim/200-A beam with a diameter of /spl sim/2 mm.