Stabilizations of Gyrotron frequency and power by PID double feedback control on the acceleration and anode voltages

The results of both gyrotron output power and frequency stabilization by double PID feedback control of acceleration voltage and anode voltage have been presented. The second harmonic 460 GHz Gyrotron with isolated collector has been used in the stabilization experiment. In the long term experiment, the frequency stabilization was better than 10^-6 and the power stabilization was better than ±1%.