Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)


Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy Density (HED) instrument of the European X-ray Free-Electron Laser (EuXFEL)

Liermann, H. P.; Konôpková, Z.; Appel, K.; Prescher, C.; Schropp, A.; Cerantola, V.; Husband, R. J.; McHardy, J. D.; McMahon, M. I.; McWilliams, R. S.; Pépin, C. M.; Mainberger, J.; Roeper, M.; Berghäuser, A.; Damker, H.; Talkovski, P.; Foese, M.; Kujala, N.; Ball, O. B.; Baron, M. A.; Briggs, R.; Bykov, M.; Bykova, E.; Chantel, J.; Coleman, A. L.; Cynn, H.; Dattelbaum, D.; Dresselhaus-Marais, L. E.; Eggert, J. H.; Ehm, L.; Evans, W. J.; Fiquet, G.; Frost, M.; Glazyrin, K.; Goncharov, A. F.; Hwang, H.; Jenei, Z.; Kim, J.-Y.; Langenhorst, F.; Lee, Y.; Makita, M.; Marquardt, H.; McBride, E. E.; Merkel, S.; Morard, G.; Obannon, E. F.; Otzen, C.; Pace, E. J.; Pelka, A.; Pigott, J. S.; Prakapenka, V. B.; Redmer, R.; Sanchez-Valle, C.; Schölmerich, M.; Speziale, S.; Spiekermann, G.; Sturtevant, B. T.; Toleikis, S.; Velisavljevic, N.; Wilke, M.; Yoo, C.-S.; Baehtz, C.; Zastrau, U.; Strohm, C.

The high-precision X-ray diffraction setup for work with diamond anvil cells (DACs) in interaction chamber 2 (IC2) of the High Energy Density instrument of the European X-ray Free-Electron Laser is described. This includes beamline optics, sample positioning and detector systems located in the multipurpose vacuum chamber. Concepts for pump–probe X-ray diffraction experiments in the DAC are described and their implementation demonstrated during the First User Community Assisted Commissioning experiment. X-ray heating and diffraction of Bi under pressure, obtained using 20 fs X-ray pulses at 17.8 keV and 2.2 MHz repetition, is illustrated through splitting of diffraction peaks, and interpreted employing finite element modeling of the sample chamber in the DAC.

Keywords: diamond anvil cells; x-ray free electron lasers; high precision x-ray diffraction; finite element modeling

Permalink: https://www.hzdr.de/publications/Publ-34147
Publ.-Id: 34147