Calculation of double anode magnetron injection gun for gyrotron using boundary element method

Physical and mathematical models of the magnetron injection gun(MIG) were constructed, and a code for MIG’s calculation was developed. A double anode magnetron injection gun for gyro-TWT amplifier working at 35 GHz, 70 kV and 10 A was designed and simulated by the progran, and optimized simulation results were obtained. The influence of the beam voltage and magnet field on electron beam performance was studied. The results show that the boundary element method is an effective approach for analysis of electron optics system in gyro-devices.