It is known, that at high energies of ions (more than 10 MeV for light ions) the focusing by magnetic quadrupole fields is most effective, whereas at small energies (less than 1 MeV) - the focusing by electrical quadrupole fields. At intermediate energies of ions (from 1 to 10 MeV) the efficiency of each of these types of a focusing is reduced. The authors offer to utilize for this purpose the hybrid type of focusing systems consisting of sequence of electrical and magnetic quadrupole lenses, which are localized in the same space. For making fields of electrical quadrupole lenses it is offered to utilize RF quadrupoles. The RF electrical quadrupoles are created due to the relevant configuration of drift tubes in the vicinity of an accelerating gap. As a result of the general theoretical analysis and calculation of concret
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