Experimental realization of W-band relativistic gyrotron with 5 MW output power

The relativistic gyrotron with thermionic magnetron-injection gun was developed and experimentally tested at 3-mm wavelength band. The gyrotron yielded stable generation of the rotating TE12,5,1 mode of a circular waveguide cavity with 250 kV/100A helical electron beam. The mode was transformed into the Gaussian wave beam by a built-in mode converter. Output power of the gyrotron was over 5 MW in pulses with durations of about 0.5 μs.