Development of the UHV Acceleration Power Supply with High Stability for CPD Gyrotron

Abstract

A key DC power supply using DC-DC converter for the electron beam acceleration of the millimeter wave high power gyrotron was developed. A Collector Potential Depression (CPD) system which requires an acceleration power supply is employed to enhance the efficiency of gyrotron. The DC-DC converter technique, without series-regulator, incorporating a PWM chopper control circuit, 6 inverters and 12 transformers at frequency of 5kHz is applied to this acceleration power supply whose maximum capacity is 100 kV, 0.3A and own efficiency is 91.3%. The CPD gyrotron using the developed acceleration power supply demonstrated the world highest efficiency of 48% under the condition of 110GHz and 350kW for 5 seconds.