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@INPROCEEDINGS{Lehrach:1034955,
      author       = {Lehrach, Andreas and Lenisa, Paolo},
      title        = {{O}ptimization of spin-coherence time for electric dipole
                      moment measurements},
      volume       = {SPIN 2023},
      publisher    = {Proceedings of Science},
      reportid     = {FZJ-2025-00067},
      series       = {PoS},
      pages        = {092},
      year         = {2023},
      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.},
      month         = {Sep},
      date          = {2023-09-24},
      organization  = {25th International Spin Symposium,
                       Durham (NC, USA), 24 Sep 2023 - 29 Sep
                       2023},
      cin          = {IKP-4},
      cid          = {I:(DE-Juel1)IKP-4-20111104},
      pnm          = {621 - Accelerator Research and Development (POF4-621)},
      pid          = {G:(DE-HGF)POF4-621},
      experiment   = {EXP:(DE-MLZ)EDM-20140101},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      url          = {https://juser.fz-juelich.de/record/1034955},
}