1. Institute of Quantum Electronics, Eidgenössische Technische Hochschule (ETH) Zürich, Auguste-Piccard-Hof 1, 8093 Zürich, Switzerland
2. Radboud University, Institute for Molecules and Materials, Heyendaalseweg 135, 6525AJ Nijmegen, Netherlands
3. SwissFEL, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
4. School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, 300072 Tianjin, People’s Republic of China