1. Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
2. National Research Council of Canada, 100 Sussex Dr., Ottawa, Ontario K1A 0R6, Canada
3. School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
4. Synchrotron SOLEIL, l’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
5. Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, United Kingdom
6. Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA