Spin Transparency Method for High Precision Experiments with Polarized Beams

Abstract

The spin transparency method is a technique for efficient and flexible control of the beam polarization in a synchrotron. It can be implemented in a figure-8 collider, a racetrack with two identical Siberian snakes, as well as in a conventional ring at an energy corresponding to an integer spin resonance. Weak-field magnetic insertions called Spin Navigators provide polarization stabilization and manipulation including spin flipping. By compensating the spin effects of imperfections, a real synchrotron can be turned into an effectively ideal ring from the spin dynamics point of view thus enabling fundamental ultra-high precision experiments such as search for Electric Dipole Moment and Dark Matter. We discuss the possibility of applying the spin transparency mode at ultra-high energies.