Investigation of X-Band Coaxial Magnetron using Three-dimensional Particle-In-Cell Simulation

Medical magnetrons to operate the medical linear accelerator (LINAC) are widely used for the radiation therapy systems. The operation performances of medical LINAC generating the high energy X-ray to treat the cancers depends on the RF performances of medial magnetron. The medical 9.3 GHz coaxial magnetron is investigated by using three-dimensional particle-in-cell simulation to analyze the RF performances. The maximum output power of 1.88 MW with the efficiency of 53 % is measured at the stable π-mode resulted from the 20-electron spokes. And, the frequency bandwidth controlled by the frequency tuner shows the 1.5 MHz/μm with the bandwidth of 60 MHz.