Gyrotron Output Power Stabilization by PID Feedback Control of Heater Current and Anode Voltage

Abstract

To provide stable output power of a gyrotron during long operation time the power stabilization was achieved by two schemes with PID feedback control of heater current and anode voltage. It was based on the dependence of the output power on both the anode voltage and the beam current and also on the dependence of the beam current on the gun heater current. Both schemes provided decrease of the power standard deviation to 0.3-0.5%. The comparison between parameters of both schemes is discussed in the paper.

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…For this reason, another PID controller was applied. This approach is comprehensively described in paper [75], where three configurations are investigated. In the first configuration, the control value is the gun heater current, and the feedback (set point) value is the electron beam current.…”

Gyrotrons for High-Power Terahertz Science and Technology at FIR UF

“…A proportional-integral-derivative (PID) feedback control system has been developed, which decreases the beam current fluctuations from 17 % to 0.5% and these of the output power from 15 % to 5 % by controlling the current of the heating filament of the cathode. More effective stabilization of the output power (up to 2%) has been realized by a feedback control that adjusts the voltage of the heater [37][38][39].…”