Particle-in-Cell Analysis of 1 MW/110GHz Gyrotron Interaction Cavity

Abstract

In this paper, the design and numerical analysis of the interaction cavity for 1 MW, 110 GHz gyrotron is presented. The in-house developed code GCOMS and the commercially available 3D particle-in-cell simulation code MAGIC have been used for the mode selection and optimization of the interaction cavity parameters respectively. TE 22;6 mode has been chosen as the operating mode. The cold cavity and the beam-wave interaction analysis have been carried out for the TE 22;6 mode and the output power and the efficiency have been computed. The sensitivity analysis of the output power and the efficiency has also been performed with respect to the cavity geometry and the electron beam parameters. More than 1 MW output power has been achieved at 110 GHz frequency with the selected operating mode.