Design of a Planar Sheet-Beam Magnetron Injection Gun

A planar sheet-beam magnetron injection gun for the 94GHz sheet beam metallic grating waveguide amplifier based on combined resonance has been designed in this paper. The planar sheet-beam magnetron injection gun has two anodes which can optimize velocity ratio and transverse velocity spread conveniently. The electron beam produced by the planar sheet-beam magnetron injection gun can operate at accelerating voltage 34kV and current 1.7A. The guiding center of the electron beam at the region of interaction is 0.525mm and the magnetic field at interaction region is 2.8T. The simulation result of Opera indicate that the velocity ratio is 1.16 and transverse velocity spread is 3.5%.