1. Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
2. Department of Physics, Stony Brook University, Stony Brook, New York 11794, United States
3. Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
4. Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States