A Novel Multi-beam Magnetron Injection Gun for W-band Gyro-TWT

In order to enhance the power capacity of Gyro-TWT in high frequency, a novel multi-sector-tunnel Gyro-TWT is study in this paper. The multi-sector-tunnel could extend the transverse dimension of RF circuit for higher power electron transmission. The azimuthal drift performance of cyclotron electron was discussed and a multi-beam magnetron injection gun (MIG) is design. An electron beam with pitch factor of 1.02 and axial velocity spread of 2.98% is obtained.