The Dipole Magnets Arrangement in the Collider of NICA Complex

The beam phase volume blowup effect during the beam circulation in cyclic accelerator vacuum chamber, caused by the closed orbit distortion, is one of the limiting factors of the accelerator acceptance. In order to reduce the closed orbit distortions due to the effective lengths spread (magnetic field integrals) of the dipole magnets, it is proposed to arrange the dipole magnets around the ring in a special procedure. The procedures for such special dipole magnets arrangement, which allow to optimize the beam dynamic characteristics in two rings of the Collider of the NICA complex are discussed in this paper. Based on one of the proposed procedures, the arrangement of dipole magnets was chosen.