Electron source with a multi-arc plasma cathode for generating a modulated beam of submillisecond duration

The paper presents the design of a multi-arc discharge system and the principle of creating its multichannel power supply for a SOLO-type electron source with a multi-arc grid plasma emitter. The cathode assembly is based on an open (noncounteracting) arc discharge initiated by an electric breakdown along the surface of a dielectric. Compared to a single-channel system with a large distributing electrode, a multi-arc setup allows not only for increased beam diameter, but also for effective control of beam power during submillisecond pulses, as well as control over energy density distribution. The results of generating a modulated electron beam with a diameter of 30–60 mm, which is transported to the collector in a longitudinal magnetic field at a distance of about 600 mm, with a satisfactory level of homogeneity for technological applications, are presented. This approach to generating intense modulated electron beams in electron source systems with plasma cathodes significantly expands the possibilities of such unique equipment, both for scientific research and for solving industrial problems.