Investigation of Spin-Decoherence in Figure-8 Ring to Search for Cp-Violation Sources

In this paper, we consider the features of the figure-8 accelerator from the spin dynamics point of view. Some of the main advantages of such a structure are: the absence of spin resonance crossing during beam acceleration and the ability to manipulate polarization in the spin-transparent mode. In this paper, we numerically verify the hypothesis that the figure-8 ring is characterized by a spin coherence time of several hours; we consider the influence of second-order deviations in phase coordinates on decoherence. The modifications of the figure-8 ring to search for a signal of axion-like particles and the electric dipole moment of light nuclei are also presented.