Modified configuration of relativistic magnetron with diffraction output for efficiency improvement

摘要

A modified configuration of relativistic magnetron with diffraction output has been proposed in order to improve microwave conversion efficiency. In this configuration, the microwave output coupling between the magnetron cavity and the cylindrical waveguide is significantly improved. Three-dimensional particle-in-cell simulations using simulation-code MAGIC were carried out to demonstrate the effectiveness of the modified configuration. In the simulation results, the maximum microwave efficiency of ～37% has been obtained, compared with that of ～3% obtained with conventional configuration.