A TE1, 3 gyrotron at 85 GHz†

A TE1, 3 gyrotron to operate at 85 GHz with an output power of 300 kW has been designed, fabricated and tested. The device is described and results of the experimentation are given. A comparison with theory is made. Operation at the design frequency was achieved and output powers approaching 200 kW with efficiencies of 30% have been obtained.