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| Home > Publications database > Optimization of spin-coherence time for electric dipole moment measurements |
| Contribution to a conference proceedings/Contribution to a book | FZJ-2025-00067 |
;
2023
Proceedings of Science
Abstract: Electric dipole moments are very sensitive probes of physics beyond the Standard Model. TheJEDI collaboration is dedicated to the search for the electric dipole moment (EDM) of chargedparticles making use of polarized beams in a storage ring. In order to reach the highest possiblesensitivity, a fundamental parameter to be optimized is the Spin Coherence Time (SCT), i.e., thetime interval within which the particles of the stored beam maintain a net polarization greater than1/e. To identify the working conditions that maximize SCT, accurate spin-dynamics simulationshave been performed using BMAD. In this study, lattices of a "prototype" storage ring, which usescombined electric and magnetic fields for bending, and a "hybrid" storage ring using only electricbending fields with magnets for focusing, are investigated. This paper presents a model of spinbehaviour in frozen-spin lattices that models spin tune with reasonable accuracy in both situations,as well as a technique to optimize the second-order beam optics for maximum SCT at any givenworking point.
Keyword(s): Basic research (1st) ; Nuclear Physics (2nd)
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