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@MASTERSTHESIS{Hanold:1016968,
      author       = {Hanold, Nils Michael},
      othercontributors = {Büscher, Markus and Engels, Ralf W.},
      title        = {{I}nfluence of the {R}adial {M}agnetic {F}ield of a {S}ona
                      {T}ransition {U}nit on {P}olarization of {P}articles},
      school       = {HHU Düsseldorf},
      type         = {Bachelorarbeit},
      reportid     = {FZJ-2023-03875},
      pages        = {52},
      year         = {2023},
      note         = {Bachelorarbeit, HHU Düsseldorf, 2023},
      abstract     = {The capability of a Sona transition unit to induce
                      transitions between the differenthyperfne states of atoms is
                      known from [1], [2] and [5]. The specifc transitionthat is
                      induced depends on the longitudinal and the radial
                      magnetical felds of thetransition unit.Performed simulations
                      of the occupation numbers of different Hydrogen
                      hyperfinesubstates show that also the radial distance of the
                      atomic beam from the beam axisto the edge of the coils seems
                      to be important, because the radial magnetic fieldamplitude
                      is rising from the center of a magnetic coil to the
                      edge.This predicted behavior was proofed by measurements
                      with a new type of a Sonatransition unit that was
                      constructed and build for this thesis. One important
                      resultwas that more particles take part in the hyperfine
                      transitions inside the Sona unitby using radial offsets from
                      the beam axis. This results in larger amplitudes of
                      theoscillation between a high populated and high depolulated
                      state while increasingthe current inside the Sona unit. The
                      measurements show that especially at smallmagnetic fields
                      the amplitudes of the oscillations for one hyperfine state
                      is increasingwith an increasing radial offset from the beam
                      axis.It was also possible to increase the amplitudes of
                      these oscillations of the hyperfinestates from an
                      unpolarized atom beam by using a radial offset. Therefore,
                      it ispossible to polarize an unpolarized particle beam by
                      using - in the laboratoryframe - static magnetic fields.
                      This is an improvement of the known possibilitiesto create a
                      polarized particle beam because of the comparatively easy
                      and cheapway to produce and build these devices instead of
                      other methods.},
      cin          = {IKP-2 / PGI-6},
      cid          = {I:(DE-Juel1)IKP-2-20111104 / I:(DE-Juel1)PGI-6-20110106},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)2},
      doi          = {10.34734/FZJ-2023-03875},
      url          = {https://juser.fz-juelich.de/record/1016968},
}