PoS - Proceedings of Science
Volume 433 - 19th Workshop on Polarized Sources, Targets and Polarimetry (PSTP2022) - Session 9
Optimization of spin-coherence time for electric dipole moment measurements
R. Shankar*, P. Lenisa and A. Lehrach
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Pre-published on: March 27, 2023
Published on: August 04, 2023
The JEDI experiment is dedicated to the search for the electric dipole moment (EDM) of charged particles using storage rings, which can be 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 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. This contribution will present an analysis of the mechanisms behind the decoherence, some techniques to maximize SCT through the optimization of second-order focusing parameters, and the exclusive beam and spin dynamics effects of the electric component of bending fields.
DOI: https://doi.org/10.22323/1.433.0024
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