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@INPROCEEDINGS{Mller:1015306,
      author       = {Möller, Andreas and Barnsley, Lester and Brandl, Georg and
                      Feilbach, Herbert and Swaczyna, Robert},
      title        = {{D}evelopment of an halbach array for a gisaxs instrument},
      reportid     = {FZJ-2023-03650},
      year         = {2023},
      abstract     = {For nanoparticle research, a Halbach array device has been
                      developed that allows the dynamic reproducible definition of
                      the magnet field strength and orientation at a sample. The
                      maximum achievable field strength is 0.5 Tesla. The main
                      application of the Halbach array will be in the sample
                      environment of the GISAXS instrument GALAXI.The magnet field
                      orientation and strength are defined by rotating permanent
                      magnets with stepper motors. Control of the stepper motors
                      is implemented with a S7-1500 PLC in the ET200SP form
                      factor. All field computations are executed in Nicos which
                      controls the device. One challenge in development is the
                      dynamic positioning of magnets due to changing forces. For
                      vacuum applications, a water-cooling system has been
                      implemented that allows the control of the motor
                      temperatures. Design and implementation of the Halbach array
                      device as well as future plans will be presented.},
      month         = {Sep},
      date          = {2023-09-18},
      organization  = {Design and Engineering of Neutron
                       Instruments Meeting, Forschungszentrum
                       Jülich + online (Germany), 18 Sep 2023
                       - 22 Sep 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / PGI-JCNS-TA / JCNS-FRM-II},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)PGI-JCNS-TA-20110113 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      doi          = {10.34734/FZJ-2023-03650},
      url          = {https://juser.fz-juelich.de/record/1015306},
}