Patent ID: 8878433

Claim:
A magnetron for delivering megawatt power at a non-relativistic diode voltage, said magnetron comprising, in combination: a) an upstream coaxial waveguide comprising a central core and a surrounding exterior layer separated by an annular void defining an upstream chamber, said waveguide being electrically coupled to an adjoining downstream slow wave structure; b) said slow wave structure including: (i) a rod-shaped central supporting cylinder; (ii) a helical cathode comprising fourteen turns, the axis of said cathode being coaxial with that of said supporting cylinder; (iii) an anode slow wave structure, said anode slow wave structure being coaxial with and surrounding said supporting cylinder and separated therefrom by a void defining a downstream interaction region; and (iv) said anode structure comprising fourteen interiorly-directed vanes defining fourteen resonance cavities therebetween, with each of said resonance cavities comprising a wedge portion adjoined to a neck portion.