Power-stabilization of high frequency gyrotrons using a double PID feedback control for applications to many high power THz spectroscopy

摘要

High stabilization of the output power of high frequency gyrotrons for high power THzspectroscopy is an important issue in order to extend the applications of gyrotrons to wider subjects.For this objective, we tried a PID feedback control on a heater current of a triode magnetroninjection gun (MIG) for stabilization of an electron beam current and an additional PID control ofan anode voltage of the gun for direct stabilization of output power. This double PID controlachieves effective responses for the stabilization of output power in both slow (several tens secondsto several minutes) and fast (milliseconds to seconds) time scales.