Design and Study of W-band Gyrotron with Output Power of 150 kW Level

Abstract

Based on the linear theory and the self-consistent nonlinear theory, a 94 GHz complex cavity gyrotron is designed with the pair of TE7.2/TE7.3 operating mode in this paper. Through operating at the high-order mode and second harmonic, the gyrotron can output hundred-kilowatt power at low magnetic field. Furthermore, the influences of electron beam parameters on interaction efficiency are analyzed in detail. As a result, the output power of 173 kW, corresponding to 34.83% efficiency, has been achieved with the beam voltage 71 kV, the beam current 7 A, the pitch factor 1.3 at the DC-magnetic field of 1.83T.