欧洲X射线自由电子激光（EuXFEL）高能密度（HED）仪器中用于金刚石对顶砧盒内兆赫兹X射线衍射的新型实验装置。
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).
作者信息
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 Zs, Kim J Y, Langenhorst F, Lee Y, Makita M, Marquardt H, McBride E E, Merkel S, Morard G, O'Bannon E F, Otzen C, Pace E J, Pelka A, Pigott J S, Prakapenka V B, Redmer R, Sanchez-Valle C, Schoelmerich M, Speziale S, Spiekermann G, Sturtevant B T, Toleikis S, Velisavljevic N, Wilke M, Yoo C S, Baehtz C, Zastrau U, Strohm C
机构信息
Photon Sciences, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, Hamburg, Germany.
European X-Ray Free-Electron Laser Facility GmbH, Holzkoppel 4, 22869 Schenefeld, Germany.
出版信息
J Synchrotron Radiat. 2021 May 1;28(Pt 3):688-706. doi: 10.1107/S1600577521002551. Epub 2021 Apr 14.
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.
介绍了用于欧洲X射线自由电子激光高能密度仪器交互室2（IC2）中金刚石对顶砧（DAC）的高精度X射线衍射装置。这包括位于多功能真空室中的束线光学、样品定位和探测器系统。描述了DAC中泵浦-探测X射线衍射实验的概念，并在首次用户社区辅助调试实验中展示了其实施情况。通过衍射峰的分裂展示了在17.8keV和2.2MHz重复频率下使用20 fs X射线脉冲获得的Bi在压力下的X射线加热和衍射，并采用DAC中样品室的有限元模型进行了解释。
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