1. Division of Synchrotron Radiation Research, Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
2. Physik Department E20, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
3. MAX IV Laboratory, Lund University, P.O. Box 118, 221 00 Lund, Sweden