Cw operation of a submillimeter wave gyrotron (gyrotron FU IV) for high stability of the output frequency

摘要

The first cw operation of our submillimeter wave gyrtron (Gyrotron FU IV) using a 12 T superconducting magnet has been successfully carried out. Output power is more than 20 W at a frequency of 301 GHz in the TE_(031) resonant cavity mode. Time-resolved frequency measurement s shows that the frequency fluctuation of the gyrotron output is smaller than 2 MHz. This frequency fluctuation is mainly due to the fluctuation in the output voltage of the power supply.