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Title: X-ray free-electron laser based dark-field X-ray microscopy: a simulation-based study

Journal Article · · Journal of Applied Crystallography (Online)
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Technical Univ. of Denmark, Lyngby (Denmark)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Dark-field X-ray microscopy (DFXM) is a nondestructive full-field imaging technique providing three-dimensional mapping of microstructure and local strain fields in deeply embedded crystalline elements. This is achieved by placing an objective lens in the diffracted beam, giving a magnified projection image. So far, the method has been applied with a time resolution of milliseconds to hours. In this work, the feasibility of DFXM at the picosecond time scale using an X-ray free-electron laser source and a pump–probe scheme is considered. Thermomechanical strain-wave simulations are combined with geometrical optics and wavefront propagation optics to simulate DFXM images of phonon dynamics in a diamond single crystal. Using the specifications of the XCS instrument at the Linac Coherent Light Source as an example results in simulated DFXM images clearly showing the propagation of a strain wave.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; Villum Foundation; European Research Council (ERC); Danish Agency for Science and Higher Education
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344; 00028346; 885022; 8144-00002B
OSTI ID:
1856259
Journal Information:
Journal of Applied Crystallography (Online), Vol. 55, Issue 1; ISSN 1600-5767
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

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