A MHz X-ray diffraction set-up for dynamic compression experiments in the diamond anvil cell

An experimental platform for dynamic diamond anvil cell (dDAC) research has been developed at the High Energy Density (HED) Instrument at the European X-ray Free Electron Laser (European XFEL). Advantage was taken of the high repetition rate of the European XFEL (up to 4.5   MHz) to collect pulse-resolved MHz X-ray diffraction data from samples as they are dynamically compressed at intermediate strain rates ( ≤ 103   s − 1), where up to 352 diffraction images can be collected from a single pulse train. The set-up employs piezo-driven dDACs capable of compressing samples in ≥ 340   µ s, compatible with the maximum length of the pulse train (550   µ s). Results from rapid compression experiments on a wide range of sample systems with different X-ray scattering powers are presented. A maximum compression rate of 87   TPa   s − 1 was observed during the fast compression of Au, while a strain rate of ∼ 1100   s − 1 was achieved during the rapid compression of N2 at 23   TPa   s − 1.

Source: Journal of Synchrotron Radiation - June 15, 2023 Category: Physics Authors: Husband, R.J. Strohm, C. Appel, K. Ball, O.B. Briggs, R. Buchen, J. Cerantola, V. Chariton, S. Coleman, A.L. Cynn, H. Dattelbaum, D. Dwivedi, A. Eggert, J.H. Ehm, L. Evans, W.J. Glazyrin, K. Goncharov, A.F. Graafsma, H. Howard, A. Huston, L. Hutchinson, T Tags: extreme conditions science X-ray free-electron lasers diamond anvil cells dynamic compression research papers Source Type: research