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@PHDTHESIS{Nickel:141523,
      author       = {Nickel, Florian},
      title        = {{A}berrationskorrigierte {P}hotoemissionsmikroskopie an
                      magnetischen {S}ystemen: {V}on statischer
                      {C}harakterisierung zu zeitaufgelöster {A}bbildung},
      volume       = {75},
      school       = {Universität Duisburg},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2013-06691},
      isbn         = {978-3-89336-913-3},
      series       = {Schriften des Forschungszentrums Jülich. Reihe
                      Schlüsseltechnologien / key technologies},
      pages        = {x, 99 S.},
      year         = {2013},
      note         = {Universität Duisburg, Diss., 2013},
      abstract     = {This thesis aims at realizing time-resolved
                      magnetic-imaging in an energy-filtered and
                      aberration-corrected photoemission microscope (TRACX-PEEM).
                      To routinely make use of higher lateral resolution in
                      conjunction with improved transmission of the latest
                      generation PEEM, the aberration coefficients C$_{3}$,
                      C$_{c}$ of the electron lenses had to be measured
                      experimentally. The phase space of the tetrode
                      mirror-corrector was further on adapted to the determined
                      lens aberrations in order to employ fully automatic and
                      start-energy dependent aberration tracking. For efficient
                      use of the synchrotron radiation a new time-resolving mode
                      of operation was developed preserving energy-filtering and
                      aberration-correction of the PEEM. The developments consist
                      of a sample holder for excitation of a sample with a
                      magnetic field up to 10 mT within 1 ns. Furthermore, a novel
                      type of deflection gating was developed, to block the
                      electron optical axis within a few nanoseconds. The system
                      involves an electrostatic de ection electrode, as an
                      additional electron-optical element, incorporated in a
                      magnetic prism sector. The new operation mode enables
                      time-resolved experiments using isolated bunches of the
                      filling-pattern. To directly measure the excitation pulse
                      during time-resolved experiments, a new method based on
                      time- and spatially resolved secondary electron spectroscopy
                      is developed. The method allows for quantifying the
                      time-dependent secondary-electron spectra of a
                      microstripline and further analysis of amplitude and shape
                      of the excitation pulse. Within this thesis, magnetodynamic
                      measurements using a novel type of aberrationcorrected PEEM
                      were performed for the first time. The measurements were
                      carried out on microstructured Permalloy samples. The
                      magnetodynamic response of the latter was explored on the
                      picosecond time-scale exploiting the newly developed
                      TRACX-PEEM method. For additional survey and interpretation
                      of the experiments, micromagnetic simulations were
                      performed.},
      keywords     = {Dissertation (GND)},
      cin          = {PGI-6},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/141523},
}