Development of 260 GHZ second harmonic CW gyrotron with high stability of output parameters for dnp spectroscopy

Development of continuous-wave 258.6 GHz gyrotron with output power about 20 W with high stability of output parameters is presented. This paper includes results of calculation, design, technical requirements and experimental tests for main subsystems of gyrotron and auxiliaries. The gyrotron setup shall be a part of a complex experimental system for NDP spectroscopy.