1. Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
2. Division of Synchrotron Radiation Research, Lund University, 221 00 Lund, Sweden
3. nCHREM, Lund University, 221 00 Lund, Sweden
4. Diamond Light Source, OX11 0DE Didcot, U.K.
5. MAX IV Laboratory, Lund University, Fotongatan 2, 224 84 Lund, Sweden
6. CNR-SPIN, Via Del Fosso del Cavaliere 100, I-00133 Rome, Italy
7. Division of Synchrotron Radiation Research, Lund University, Professorsgatan 1, 22100 Lund, Sweden