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@INPROCEEDINGS{Margos:1024289,
      author       = {Margos, Michael},
      title        = {{D}etermining quadrupole magnetic length shortening in
                      {COSY} using a {B}mad model},
      school       = {RWTH Aachen},
      reportid     = {FZJ-2024-02087},
      year         = {2024},
      abstract     = {In particle accelerators and storage rings, electromagnets
                      are used to contain the particle beam. While dipole magnets
                      bend the trajectory, quadrupole magnets focus the beam
                      towards nominal orbit. With multiple quadrupoles used, a
                      coherent oscillation occurs, and the number of oscillations
                      per revolution inside the ring is called betatron tune.To
                      better understand electric dipole moments, the
                      JEDI-Collaboration (Jülich Electric Dipole moment
                      Investigations) in Jülich needs an accurate understanding
                      of its storage ring COSY (COoler SYnchrotron). The model
                      used in the simulation software Bmad and found a discrepancy
                      between betatron tune measurements and computed betatron
                      tune. The primary suspect for this discrepancy is a
                      mismodelling of quadrupole magnets, especially magnetic
                      length shortening due to surrounding ferromagnetic material.
                      Tune measurements with different quadrupole currents applied
                      are compared to model tunes to determine actual quadrupole
                      strengths.},
      month         = {Mar},
      date          = {2024-03-17},
      organization  = {DPG-Frühjahrstagung, Berlin
                       (Germany), 17 Mar 2024 - 22 Mar 2024},
      subtyp        = {Other},
      cin          = {IKP-2},
      cid          = {I:(DE-Juel1)IKP-2-20111104},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / srEDM -
                      Search for electric dipole moments using storage rings
                      (694340)},
      pid          = {G:(DE-HGF)POF4-611 / G:(EU-Grant)694340},
      experiment   = {EXP:(DE-Juel1)JEDI-20170712},
      typ          = {PUB:(DE-HGF)6},
      doi          = {10.34734/FZJ-2024-02087},
      url          = {https://juser.fz-juelich.de/record/1024289},
}