1. Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
2. Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark
3. NanoLund, Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
4. National Research Tomsk Polytechnic University (TPU), pr. Lenina 30, 634050 Tomsk, Russia
5. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe shosse 31, 115409 Moscow, Russia