Numerical simulation of the intensive electron and ion beam sources

Numerical algorithms of the electron and ion beams calculation with the increased accuracy, based on the nearcathode singularity isolation arc suggested and realized by decomposition of the computational domain to the nearcathode and the basic subdomains. Calculations in nearcathode subdomain arc carried out on a basis of the antiparaxial V.A.Syrovoy´s theory, which provides adequate behavior of the solution, and in the basic subdomain the numerical algorithms are used. The examples of numerical test problems calculations are given.