Author Affiliations

Felix Allum,¹ Yoshiaki Kumagai,² Kiyonobu Nagaya,³ James Harries,⁴ Hiroshi Iwayama,^5,6 Akinobu Niozu,⁷ Mike Ashfold,⁸ Mathew Britton,¹ Philip Bucksbaum,¹ Mark Brouard,⁹ Michael Burt,⁹ David Heathcote,⁹ Paul Hockett,¹⁰ Andrew Howard,¹ Edwin Kukk,¹¹ Jason Lee,¹² Yusong Liu,¹ Joseph McManus,⁹ Dennis Milesevic,⁹ Russell Minns,¹³ Johannes Niskannen,¹¹ Andrew Orr-Ewing,⁸ Daniel Rolles,¹⁴ Artem Rudenko,¹⁴ Kiyoshi Ueda,¹⁵ James Unwin,⁹ Claire Vallance,⁹ Tiffanny Walmsley,⁹ and Ruaridh Forbes¹

¹PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA

²Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo, Japan

³Department of Physics, Kyoto University, Kyoto 606-8502, Japan

⁴QST, SPring-8, Kouto 1-1-1, Sayo, Hyogo, Japan

⁵Institute for Molecular Science, Okazaki 444-8585, Japan

⁶Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan

⁷Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8526, Japan

⁸School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, UK

⁹Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK

¹⁰National Research Council of Canada, 100 Sussex Dr. Ottawa, ON K1A 0R6, Canada

¹¹Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland

¹²Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany

¹³Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK

¹⁴J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA

¹⁵Department of Chemistry, Tohoku University, Sendai 980-8578, Japan