Current limits for axially symmetrical electron beams with nonuniform current density radial distribution

Numerical methods are used to determine values of current limits for continuous and hollow electron beams (EB) with uniform and nonuniform current density distribution over cross section during their movement in long metallic screens. The presented data cover practically the whole range of change of main geometric parameters of systems with high-current EB applied in experimental studies and can be used for preliminary estimation of current limits in lines of EB transport. 4 refs.; 7 figs