Journal of Synchrotron Radiation (May 2024)

High-pressure X-ray photon correlation spectroscopy at fourth-generation synchrotron sources

  • Antoine Cornet,
  • Alberto Ronca,
  • Jie Shen,
  • Federico Zontone,
  • Yuriy Chushkin,
  • Marco Cammarata,
  • Gaston Garbarino,
  • Michael Sprung,
  • Fabian Westermeier,
  • Thierry Deschamps,
  • Beatrice Ruta

DOI
https://doi.org/10.1107/S1600577524001784
Journal volume & issue
Vol. 31, no. 3
pp. 527 – 539

Abstract

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A new experimental setup combining X-ray photon correlation spectroscopy (XPCS) in the hard X-ray regime and a high-pressure sample environment has been developed to monitor the pressure dependence of the internal motion of complex systems down to the atomic scale in the multi-gigapascal range, from room temperature to 600 K. The high flux of coherent high-energy X-rays at fourth-generation synchrotron sources solves the problems caused by the absorption of diamond anvil cells used to generate high pressure, enabling the measurement of the intermediate scattering function over six orders of magnitude in time, from 10−3 s to 103 s. The constraints posed by the high-pressure generation such as the preservation of X-ray coherence, as well as the sample, pressure and temperature stability, are discussed, and the feasibility of high-pressure XPCS is demonstrated through results obtained on metallic glasses.

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