Thermal Design of Mirror System for Quasi-optical Mode Converters in 170 GHz Mega-watts Gyrotrons

Using water cooling method to dissipate heat of mirror system for quasi-optical mode converters in 1MW,170GHz gyrotrons. In the long pulse state, the power loss caused by the Gaussian beam on each mirror is 2000W, which is the heat source of the mirrors. The simulation results indicate that the maximum temperature of the mirrors in working condition is about 434K and the total deformations of the mirror surfaces are below 0.1mm. Empirically, the total deformations meet the transmission requirements of mirror surface precision.