The experimental effect of encouraging transparent-cathode in relativistic magnetron with "ETIGO-IV"

The Magnetron is one of the efficiency high-power microwave source, although the energy conversion efficiency decreases with pulsed-power relativistic electron beam. We study the capability to increase energy conversion efficiency of Relativistic Magnetron by using Transparent Cathode. The Transparent-Cathode consists of independent cathode strips. Each cathode strip caused azimuthal magnetic field, and the radial drift velocity of electrons are accelerated more than that of electron emitted from general cathode. It can make abbreviating start-up times. We study the relativistic Magnetron with “ETIGO IV” that is 400kV class repetitive pulsed-power generator. This pulse length is longer considering pulsed-power. In this work, we appear the effect of Transparent cathode compared with traditional cathode. The start-up time of magnetron with Transparent cathode is shorter than that with traditional cathode. The peak power and oscillation efficiency are unconfirmed. We feel strongly that Transparent cathode is encouraging method.