利用储存环光源的脉冲时间结构的纳秒级X射线光子相关光谱学。
Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source.
作者信息
Jo Wonhyuk, Westermeier Fabian, Rysov Rustam, Leupold Olaf, Schulz Florian, Tober Steffen, Markmann Verena, Sprung Michael, Ricci Allesandro, Laurus Torsten, Aschkan Allahgholi, Klyuev Alexander, Trunk Ulrich, Graafsma Heinz, Grübel Gerhard, Roseker Wojciech
机构信息
Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany.
Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany.
出版信息
IUCrJ. 2021 Jan 1;8(Pt 1):124-130. doi: 10.1107/S2052252520015778.
X-ray photon correlation spectroscopy (XPCS) is a routine technique to study slow dynamics in complex systems at storage-ring sources. Achieving nanosecond time resolution with the conventional XPCS technique is, however, still an experimentally challenging task requiring fast detectors and sufficient photon flux. Here, the result of a nanosecond XPCS study of fast colloidal dynamics is shown by employing an adaptive gain integrating pixel detector (AGIPD) operated at frame rates of the intrinsic pulse structure of the storage ring. Correlation functions from single-pulse speckle patterns with the shortest correlation time of 192 ns have been calculated. These studies provide an important step towards routine fast XPCS studies at storage rings.
X射线光子相关光谱学（XPCS）是一种在储存环光源下研究复杂系统中慢动力学的常规技术。然而，使用传统的XPCS技术实现纳秒级时间分辨率仍然是一项具有实验挑战性的任务，需要快速探测器和足够的光子通量。在此，通过采用以储存环固有脉冲结构的帧率运行的自适应增益积分像素探测器（AGIPD），展示了对快速胶体动力学的纳秒级XPCS研究结果。已经计算出来自单脉冲散斑图案、最短相关时间为192纳秒的相关函数。这些研究朝着在储存环上进行常规快速XPCS研究迈出了重要一步。
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