Non-linear theory of a large-orbit gyrotron

Abstract It is shown that the approach used in the theory of conventional, small-orbit gyrotrons can also be used in the theory of large-orbit gyrotrons. Such a conclusion permits one to apply readily the results of the well-studied non-linear theory of small-orbit gyrotrons to large-orbit gyrotrons in order to estimate their achievable efficiency and mode selectivity. A comparison of the efficiencies of gyroklystrons, and free running and phase-locked gyro-oscillators is given for devices operated at the first five harmonics of the electron cyclotron frequency.