Scattering of relativistic electrons by the anode mesh in a virtual cathode oscillator

Abstract

In this paper, we present simulation results concerning the interaction of electron beams with electrodynamic structures in high-current electronic devices with an oscillating virtual cathode (VC) [2]. We demonstrate that scattering of relativistic particles by the anode mesh leads to formation of an electron cloud near the anode. The cloud particles possess large energy spread and causeThe XV Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas", Minsk, significnt decrease of the amplitude of field oscillations in vircators. It is shown that the anode mesh with thickness approximately equal to the electron mean free path in the anode material enables to decrease the number of cloud particles and, therefore, increase the oscillation amplitude.