Multiarc Plasma Electron Emitter for Generating a Radially Convergent Beam

The results of studies on the generation of a radially converging electron beam in a source with a multiarc grid plasma emitter are presented. Generation modes have been achieved that are sufficient for modifying the surface of metallic materials and cylindrical products with a calculated energy density of up to 20 J/cm² at a pulse duration of up to 500 μs. Using an automated system for measuring plasma parameters and a single Langmuir probe in the range of arc discharge current 50–120 A and pulse duration 50–500 μs, measurements of the distribution of emission plasma parameters in a grid plasma emitter in the azimuthal and axial directions were carried out. Comparisons of the electronic branches of the probe characteristic at different working gas pressures are presented. The created electron source opens up new opportunities for comprehensive modification of the surface of various materials and products of cylindrical or more complex shapes in order to change the functional and operational properties of this surface.