A High-Efficiency Second-Harmonic Gyrotron with a Depressed Collector

摘要

The gyrotron with an electrically insulated collector has been manufactured andtested. The 60% output efficiency is obtained for the Collector Potential Depression (CPD)operation regime. The results of the numerical simulation of the electron energy spectrum inthe collector region of the second-harmonic technological 24 GHz gyrotron are presented. Itis shown, that the minimal electron beam energy is about 20% of the initial value and thatthe gyrotron cavity should be expanded to achieve the highest output efficiency of thegyrotron with energy recovery. The highest experimental decelerating voltage is in goodagreement with the calculation of the electron energy spectrum.