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@MASTERSTHESIS{Salmann:1044644,
      author       = {Salmann, Jonas},
      othercontributors = {Engels, Ralf W. and Pretz, Jörg and Lehrach, Andreas},
      title        = {{C}omparison of {S}pin {M}anipulation with {S}patially
                      {O}scillating {L}ongitudinal or {T}ransversal {M}agnetic
                      {F}ields},
      school       = {RWTH Aachen},
      type         = {Masterarbeit},
      address      = {Jülich},
      reportid     = {FZJ-2025-03308},
      pages        = {88},
      year         = {2025},
      note         = {Masterarbeit, RWTH Aachen, 2025},
      abstract     = {Sona-transition units have been used since 1967 to conduct
                      non-adiabatic transitionsbetween Zeeman states. Their energy
                      levels depend on the external magneticfield. This means that
                      spins and the external magnetic field have an
                      oppositerelative orientations after the particle beam passed
                      through the Sona-transition region,which is an area of rapid
                      inversion of the B-field. The Zeeman states willbe changed
                      as well, because they are equivalent to combinations of
                      electron- andnuclear-spin orientations. In experiments an
                      unexpected effect had beenobserved though, that presented
                      itself as oscillations of the measured intensitiesor
                      polarizations when changing the magnetic field strength in
                      the Sona-transitionregion. Only quite recent, this effect
                      could be explained: The spatially oscillatingmagnetic field
                      of the Sona-transition unit acts on passing atoms as
                      coherentphotons. Here the magnets are aligned parallel to
                      the beam line with a primarylongitudinal magnetic field. The
                      photon-like interaction between atoms and theB-field is
                      mainly caused by the higher order radial component of the
                      magneticfield. Therefore, a new setup with magnetic fields
                      orthogonal to the beam linewas developed. This new
                      transversal Sona-transition unit consists of two coilpairs
                      to produce opposing magnetic fields and was tested by
                      varying several parameterslike the distance from the beam
                      axis to the coils or the position alongthe beam line. The
                      corresponding results confirm simulations that are made
                      inparallel for this new magnetic field configuration.
                      Thereby, it was observed thatjust one coil pair and its
                      transversal magnetic field is already enough to
                      inducetransitions within the hyperfine states.},
      cin          = {IKP-2},
      cid          = {I:(DE-Juel1)IKP-2-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)19},
      doi          = {10.34734/FZJ-2025-03308},
      url          = {https://juser.fz-juelich.de/record/1044644},
}