Effective pulsed-repetitive vircator with double anode grid

In this paper we present investigation results of a vircator characteristics with a double anode grid operating in pulsed-repetitive regime. The vircator was powered from a low-inductive generator of pulsed voltages with power capacity of about 40 J. Electrons were emitted with a plain graphite cathode and injected to a parabolic drift chamber of the vircator through the anode, made of tungsten wire. Maximum energy of the electrons was 130 keV at current up to 7 kA and pulse length of about 40 ns on a half height. Pulse repetition rate was up to 100 Hz. Experimentally it was shown that use of the anode on the form of double grid provides significant increase of the generated microwave radiation in comparison with a traditional single-grid variant.