Repetitive Production of Nanosecond Gigawatt Microwave Pulses

This paper presents the results of the theoretical and experimental studies of an efficient and stably operating microwave source with a nanosecond high-current electron beam in an extended backward-wave-oscillator-type slow-wave structure. The possibilities for stabilization of the RF field phase and for minimization of the pulse-to-pulse peak power spread have been demonstrated. Possible mechanisms of the stabilization of peak microwave power are considered, with emphasis placed on the mode in which a part of the particles are reflected in an intense RF field.