OPTIMIZATION OF MULTISTAGE HARMONIC GYRODEVICES

In low voltage gyrodevices operating at high cyclotron harmonics the e lectrons are weakly coupled to the synchronous harmonic of an electrom agnetic field. To realize efficient operation of a device it is necess ary to compensate for this weak coupling by increasing the resonator e -factor. When the required e-factor is on the order of the Ohmic e-fac tor, the optimization of gyrotron parameters should be modified by tak ing into account Ohmic losses of the microwave power. In the present p aper this modification has been done and the optimization of two- and three-cavity gyrodevices operating at cyclotron harmonics has been con sidered. (C) 1996 American Institute of Physics.