The 24th International Spin Symposium

Optimisation of spin-coherence time in a prototype storage ring for electric dipole moment measurements.

21 Oct 2021, 08:10

20m

Room 305-306 (Kunibiki Messe)

Parallel Session Presentation Acceleration, Storage and Polarimetry of polarized Beams Acceleration, Storage and Polarimetry of polarized Beams

Speaker

Mr Rahul Shankar (University of Ferrara and INFN, Italy)

Description

The JEDI experiment is devoted to the search for the electric
dipole moment (EDM) of charged particles in a storage ring, as a very
sensitive probe of physics beyond the Standard Model. In order to reach the highest possible sensitivity, a fundamental parameter to be optimized is the particles' Spin Coherence Time (SCT), i.e., the time interval within which the particles of the stored beam maintain a net polarization greater than 1/e. To identify the working conditions that maximize SCT, accurate spin-dynamics simulations with the code BMAD have been performed on the lattice of a "prototype" storage ring which uses a combination of electric and magnetic fields for bending. The talk will present the results of these simulations addressing the impact on the SCT of different factors like horizontal tune, synchrotron tune and effect of the electric bending components.

Presentation materials

Optimization of Spin Coherence at a Prototype Storage Ring.pdf