Three-dimensional simulation of triode-type MIG for 1 MW, 120 GHz gyrotron for ECRH applications

In this paper, the three-dimensional simulation of triode-type magnetron injection gun (MIG) for 120 GHz, 1 MW gyrotron is presented. The operating voltages of the modulating anode and the accelerating anode are 57 kV and 80 kV respectively. The high order TE22,6 mode is selected as the operating mode and the electron beam is launched at the first radial maxima for the fundamental beam-mode operation. The initial design is obtained by using the in-house developed code MIGSYN. The numerical simulation is performed by using the commercially available code CST-Particle Studio (PS). The simulated results of MIG obtained by using CST-PS are validated with other simulation codes EGUN and TRAK, respectively. The results on the design output parameters obtained by using these three codes are found to be in close agreement.

► The complete electrical design of electron gun for high power and high frequency gyrotron.
► CST microwave studio is used for 3D simulation of electron gun for 1 MW/120 GHz gyrotron.
► Design validations with other two codes.