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@INPROCEEDINGS{Wittwer:637160,
      author       = {Wittwer, Felix and Modregger, Peter},
      title        = {{A}nnular x-ray optics offer improved resolution for
                      radiation sensitive samples},
      journal      = {Journal of physics / Conference Series},
      volume       = {3010},
      number       = {1},
      issn         = {1742-6588},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PUBDB-2025-03793},
      pages        = {012073},
      year         = {2025},
      abstract     = {To detect faint signals from weakly scattering samples,
                      high-resolution x-ray microscopy typically requires a high
                      photon flux. This exposes samples to high radiation doses
                      and can cause radiation damage. In this work we propose the
                      use of annular optics in scanning microscopy as an
                      alternative to full-aperture optics. Annular optics act as
                      high-pass filters that produce a stronger signal from edges.
                      Compared to regular optics with the same numerical aperture,
                      annular optics expose the sample to less dose while
                      producing the same signal from small sample features.
                      Annular optics benefit significantly from the high photon
                      fluxes of the latest x-ray sources to compensate for their
                      overall smaller cross section. Using numerical simulations,
                      we show that annular optics offer superior optical
                      performance for sample features close to the resolution
                      limit of the optic.},
      month         = {Aug},
      date          = {2024-08-26},
      organization  = {15th International Conference on
                       Synchrotron Radiation Instrumentation,
                       Hamburg (Germany), 26 Aug 2024 - 30 Aug
                       2024},
      cin          = {FS-PETRA},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-PETRA-20140814},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8},
      doi          = {10.1088/1742-6596/3010/1/012073},
      url          = {https://bib-pubdb1.desy.de/record/637160},
}