A Pumped Klystron Amplifier and RF Power System for the Injector Linac of 1 BeV Electron Synchrotron

Abstract

A power klystron amplifier and its driver system for a 6 MeV linear electron accelerator are described. The klystron is evacuated during its running by specially designed two oil diffusion pumps connected in series. Without using a liquid nitrogen trap the klystron works stable with the peak power output of 2–3 MW. The average life of the oxidecoated cathode was more than 500 hours. In order to keep a good frequency stability a feed back oscillator with an invar cavity and a travelling wave tube is used as a master oscillator. The output of this oscillator is 1–2 W at a frequency of 2759 Mc, with the fluctuation being less than 20 kc. The output signal of the oscillator is amplified by a pulsed travelling wave tube amplifier to drive the power klystron.