Design of Ka-Band MW-Level Low-Voltage High-Current Gyroklystron

This paper introduces a design of aKa-band MW-level gyroklystron. The first cavity and the second cavity operate fundamental TE01mode and the output cavity works at fundamental TE02mode. All design based on the PIC (Particle in cell) code MAGIC. The MAGIC simulation result shows that this gyroklystron can deliver an output power of more than 1.2 MW with a gain of $\pmb{> 35}\ \ \mathbf{dB}$ at 34 GHz and bandwidth of 5 0/0. The achieved efficiency exceeds 34 % when driven by a 70 kV, 50 A beam when the velocity ratio is around 1.04.