IUCrJ (Jan 2021)

Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source

  • Wonhyuk Jo,
  • Fabian Westermeier,
  • Rustam Rysov,
  • Olaf Leupold,
  • Florian Schulz,
  • Steffen Tober,
  • Verena Markmann,
  • Michael Sprung,
  • Allesandro Ricci,
  • Torsten Laurus,
  • Allahgholi Aschkan,
  • Alexander Klyuev,
  • Ulrich Trunk,
  • Heinz Graafsma,
  • Gerhard Grübel,
  • Wojciech Roseker

DOI
https://doi.org/10.1107/S2052252520015778
Journal volume & issue
Vol. 8, no. 1
pp. 124 – 130

Abstract

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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.

Keywords