1. SLAC National Accelerator Laboratory Menlo Park California 94025 USA
2. Department of Geological Sciences Stanford University Stanford California 94305 USA
3. LULI ‐ CNRS Ecole Polytechnique Palaiseau France
4. Institute of Geoscience Friedrich Schiller University Jena Carl‐Zeiss‐Promenade 10 Jena 07745 Germany
5. School of Ocean and Earth Science and Technology Hawai’i Institute of Geophysics and Planetology University of Hawai’i at Manoa Honolulu Hawai’i 96822 USA
6. European XFEL GmbH Schenefeld Germany
7. School of Physical Science and Technology Shanghai Tech University Shanghai 201210 China
8. United States Geological Survey Menlo Park California 94025 USA
9. School of Science and Technology, Geology Division University of Camerino Camerino I‐62032 Italy