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).
Hanns-Peter LiermannZ KonôpkováK AppelC PrescherA SchroppV CerantolaR J HusbandJ D McHardyM I McMahonR S McWilliamsC M PépinJ MainbergerM RoeperA BerghäuserH DamkerP TalkovskiM FoeseN KujalaO B BallM A BaronR BriggsM BykovE BykovaJ ChantelA L ColemanH CynnD DattelbaumL E Dresselhaus-MaraisJ H EggertL EhmW J EvansG FiquetM FrostK GlazyrinA F GoncharovH HwangZsolt JeneiJ Y KimF LangenhorstY LeeM MakitaH MarquardtE E McBrideS MerkelG MorardE F O'BannonC OtzenE J PaceA PelkaJ S PigottVitali B PrakapenkaR RedmerC Sanchez-ValleM SchoelmerichS SpezialeG SpiekermannB T SturtevantS ToleikisN VelisavljevicM WilkeC S YooC BaehtzU ZastrauC StrohmPublished in: Journal of synchrotron radiation (2021)
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.