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This paper analyses a three-cavity frequency-quadrupling terahertz gyroklystron with successive frequencydoubling in each cavity with self-consistent nonlinear theory.The beam-wave interaction efficiency and the electron bunching process are studied.The variation of output efficiency with the length of drift tubes and output power and the variation of Ohmic loss with the length of output cavity are considered.Numerical simulations predict an optimal output efficiency of 1.8%,a power output of more than 2 kW and a gain of 33 dB after taking into account Ohmic losses when the frequency-quadrupling gyroklystron,driven by a 40-kV,3-A electron beam and 1 Watt input power,operates at 225 GHz.
This paper analyzes a three-cavity frequency-quadrupling terahertz gyroklystron with successive frequency doubling in each cavity with self-consistent nonlinear theory. The beam-wave interaction efficiency and the electron bunching process are studied. The variation of output efficiency with the length of drift tubes and output power and the variation of Ohmic loss with the length of output cavity are considered. Numerical simulations predict an optimal output efficiency of 1.8%, a power output of more than 2 kW and a gain of 33 dB after taking into account Ohmic losses when the frequency-quadrupling gyroklystron, driven by a 40-kV, 3-A electron beam and 1 Watt input power, operates at 225 GHz.