The LIDOS.RFQ.Designer code package gives users the possibility to proceed successfully from input data up to RFQ channel design and space-chargedominated beam simulation. The code main feature is a maximum of scientific visualization for each calculation step. The package contains codes with three levels of mathematical model complexity. The first-level codes make not only a preliminary choice of the main parameter arrays on the basis of a simplified physical model but also chosen design optimization. In the case of high-current CW RFQ radiation purity (minimum of lost particles) is considered as the main optimization criteria. The secondlevel codes are used for RF field calculations taking into account the real shape of the RFQ vanes. The third-level codes are based on complex PIC-models that are needed for beam simulation in the chosen channel version.
For experiments with polarized protons and deuterons, the NICA collider is planned to be used in the transparent spin mode, which is provided by two solenoid snakes. The required direction of polarization in the SPD detector is set by “spin navigators”, which are insertions that rotate the spins at small angles. The polarization outside the SPD detector is determined by arc dipoles and the placement of snake solenoids in the collider. The kinematics of beam polarization is calculated when vertical, longitudinal or radial polarization is set in the SPD detector for different schemes of placement of snake solenoids. The results are relevant to solve the problems of injection and polarimetry for conducting experiments with polarized beams in the spin transparency mode.
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