The dynamics of a high-current proton beam in the cusp magnetic field and in the uniform magnetic field of the drift region in the presence of an accelerating field in the cusp region and of two types of compensating electron beams (before and after the cusp) has been studied. It is shown that for the taken beam parameters and magnetic field it is impossible to accelerate a proton beam of the density higher than 1012 cm-3 with maintaining its initial transverse size and monoenergeticity.

2.5D simulation of the process of the magnetic isolation of electrons and the acceleration of ions when injecting a high-current ion beam, compensated by an electron beam, into a magnetic cusp with an accelerating gap, followed by its re-compensation by another electron beam and transportation along the drift region with a longitudinal magnetic field, was carried out. The dependence of the characteristics of the accelerated and compensated ion beam at the drift region exit upon the set of initial parameters of the ion and electron beams and the values of the magnetic and accelerating electric fields was considered.