Design and PIC Simulation of Klystron like RBWO at Lower Guiding Magnetic Field

An X-band Klystron like RBWO with a single extraction cavity has been designed and simulated for its beam-wave interaction behavior at lower guiding magnetic field using FDTD based electromagnetic code. The present simulation predicted a maximum RF output power ~1.1 GW with some stability at 9.48 GHz for an applied input DC voltage of 660 kV, beam current of 4.059 kA, and 0.58 T. The power conversion efficiency has been calculated as ~40%.