Coaxial relativistic backward wave oscillator and coaxial master oscillator-power amplifier

摘要

A two and one half dimensional particle-in-cell code MAGIC has been used to investigate the nonlinear beam-wave interaction in a coaxial relativistic backward wave oscillator (RBWO) and optimize the dependence of the output power on electron beam nature parameter, slow wave structure geometry and magnetic guide field. The optimum conditions for the coaxial RBWO were obtained. The simulation results show: the coaxial RBWO can generate 3.2 GW peak output power at 10.2 GHz in the TM02 made when an annular electron beam of 20 KA is accelerated across a diode potential of 600 KV and guided through a section of uniform coaxial corrugated waveguide by an axial magnetic field of 25 KG, the peak efficiency is about 27%. A novel coaxial master oscillator - power amplifier was presented in this paper.