Design studies on a 110 GHz, 1.0–1.5 MW, CW, gyrotron

In this work, the on going design study on a 1.0-1.5 MW, CW gyrotron operating at 110 GHz, for plasma heating applications is reported. This work is a logical extension of the recent works on a similar type of gyrotron carried out elsewhere but with somewhat higher output power level. Rigorous mode selection procedures suggest that the modes TE_22,8 or TE_22,7 can be chosen as probable operating modes. Cold cavity design and self-consistent calculations are carried out for the TE_22,8 mode and power and efficiencies are computed. In addition, self-consistent time-dependent computations are also performed. Initial results indicate that an output power in excess of 1.5 MW can be achieved at 110 GHz with the chosen operating mode.