1. Institute of Applied Physics; Abbe Center of Photonics, Friedrich-Schiller-Universität Jena; Albert-Einstein-Strasse 15 07745 Jena Germany
2. ANKA/Institute for Photon Science and Synchrotron Radiation; Karlsruhe Institute of Technology; PO box 3640 76021 Karlsruhe Germany
3. Fraunhofer Institute for Applied Optics and Precision Engineering; Albert-Einstein-Straße 7 07745 Jena Germany