Gain and bandwidth in stagger-tuned gyroklystrons and gyrotwystrons

This paper describes an analytical approach to consideration of the tradeof f between the gain and the bandwidth in gyroklystrons and gyrotwystrons wit h stagger-tuned cavities, This approach is based on the "point-gap" model, in which short cavities are responsible for electron energy modulation only , while orbital phase bunching caused by this modulation proceeds in long d rift sections. The paper contains a review of results of the analysis of st agger-tuned gyroklystrons and gyrotwystrons obtained previously. It also in cludes new results of the study of gyroklystrons in which different cavitie s operate at different cyclotron harmonics.