Design and Simulation of MIG for a W-band Second Harmonic Gyroklystron

This paper presents a design of the triode magnetron injection gun (MIG) for W-band second harmonic gyroklystron. The dispersion relationship and beam-wave coupling strength are used to determine the beam parameters. The basic gun geometry size is obtained by the trade-off equation. The simulation shows that the electron trajectory is uniformly distributed, the velocity ratio is 1.45, the velocity spread is 2.2% and the guiding center radius is 1.63 mm, which meets the performance parameters of the electron beam.