Note: Soft X-ray transmission polarizer based on ferromagnetic thin films

Research output: Contribution to journalArticle


A transmission polarizer for producing elliptically polarized soft X-ray radiation from linearly polarized light is presented. The setup is intended for use at synchrotron and free-electron laser beamlines that do not directly offer circularly polarized light for, e.g., X-ray magnetic circular dichroism (XMCD) measurements or holographic imaging. Here, we investigate the degree of ellipticity upon transmission of linearly polarized radiation through a cobalt thin film. The experiment was performed at a photon energy resonant to the Co L3-edge, i.e., 778 eV, and the polarization of the transmitted radiation was determined using a polarization analyzer that measures the directional dependence of photo electrons emitted from a gas target. Elliptically polarized radiation can be created at any absorption edge showing the XMCD effect by using the respective magnetic element.


  • L. Müller
  • G. Hartmann
  • S. Schleitzer
  • M. H. Berntsen
  • M. Walther
  • R. Rysov
  • W. Roseker
  • F. Scholz
  • J. Seltmann
  • L. Glaser
  • J. Viefhaus
  • K. Mertens
  • K. Bagschik
  • R. Frömter
  • A. De Fanis
  • I. Shevchuk
  • K. Medjanik
  • H. P. Oepen
  • M. Martins
  • M. Meyer
  • G. Grübel
External organisations
  • German Electron Synchrotron (DESY)
  • KTH Royal Institute of Technology
  • European XFEL GmbH
  • Hamburg Centre for Ultrafast Imaging
  • University of Hamburg
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number036103
JournalReview of Scientific Instruments
Issue number3
Publication statusPublished - 2018 Mar 1
Publication categoryResearch