Practical Considerations in the Design of a High-Power l-mm Gyromonotron

A second harmonic gyromonotron has been designed to have an output of 4 kW at a frequency of 240 GHz, and to operate with an overall efficiency of 14 percent. The design method utilized a detailed theory of the gyrotron oscillator and an electron orbit computer code. Particular attention was paid to the problem of mode competition in the osciftator cavfty. Although a particular design example is considered, the method is of general interest.