The invention belongs to the technical field of high-power microwaves, and discloses an inner side
microwave extraction and outer side
electron collection type high-order mode coaxial output cavity which comprises an outer conductor 401, an inner conductor 402, a
drift tube 403, a reflector 404, a first extraction cavity gap 405, a second extraction cavity gap 406, a collector outer cylinder 407, an
electron beam collector 408, an output
waveguide inner conductor 409, an output
waveguide 410 and an output port adjusting block 411. The overall structure is rotationally symmetrical about the central axis. The
electron beam collector is arranged on the outer side where external cooling liquid is easy to introduce, and the
surface energy deposition density of the collector is reduced by using obliquely incident electron beams, so that the problem that the existing coaxial output cavity collector is easy to ablate is effectively solved; meanwhile, the high-order mode extraction cavity is used for widening the radial width of the output port slit, and the problem that the output port slit of an existing coaxial extraction structure is extremely prone to breakdown is effectively solved. The high-order mode coaxial output cavity has important reference significance for the structural design of the coaxial output cavity required by the long-pulse and high-repetition-frequency coaxial HPM source.