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Observing high pressure melting and crystallization of silicates utilizing MHz diffraction at the European X-ray free electron laser

The opening of the European X-ray Free Electron Laser near Hamburg (EuXFEL) offers promising new experimental opportunities for studying materials. It can deliver X-rays with energies up to 25 keV and its brightness is so large, that a single pulse exhibits enough intensity to generate a diffraction image. In combination with the 4.5 MHz (220 ns separation) rate of pulse delivery, and new detector technologies (AGIPD), the EuXFEL enables unique capabilities for time resolved diffraction experiments.

Coupling these new capabilities with laser heated diamond anvil cells, enables the study of materials under planetary conditions with unprecedented time resolution, possibly overcoming previous issues with chemical reactions between the sample and its environment as well as the study of transient phenomena such as phase transformations.

We will present first results and challenges of experiments investigating silicates under extreme conditions at the “High Energy Density” (HED) instrument of the European XFEL during two community proposals which brought together around fifty international participants (proposal numbers #2292 and #2605).


Clemens Prescher1, Guillaume Morard2, Marzena Baron3, Ryan Stewart McWilliams4, EuXFEL community proposal #22925, EuXFEL community proposal #26056
1Faculty of Environment and Natural Ressources, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 5, D-79104 Freiburg, Germany; 2Université Grenoble Alpes, CNRS, ISTerre, F-38000 Grenoble, France; 3Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000 Lille, France; 4School of Physics and Astronomy, Centre for Science at Extreme Conditions, and SUPA, University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom; 5PI R.S. McWilliams, "Femtosecond Hard X-ray Studies at High Static Pressure"; 6PI G. Morard & C. Prescher, "MHz diffraction and single shot heating experiments in the DAC, using pulsed IR laser or X-rays"
GeoMinKöln 2022