Extracting contrast in an X-ray speckle visibility spectroscopy experiment under imperfect conditions
Abstract
Pump–probe experiments at synchrotrons and free-electron lasers to study ultrafast dynamics in materials far from equilibrium have been well established, but techniques to investigate equilibrium dynamics on the nano- and pico-second timescales remain underdeveloped and experimentally challenging. A promising approach relies on a double-probe X-ray speckle visibility spectroscopy setup at split-and-delay beamlines of X-ray free-electron lasers. However, the logistics in consistently producing two collinear, perfectly overlapping pulses necessary to conduct a faithful experiment is difficult to achieve. In this paper, a method is introduced to extract contrast in the case where an angular misalignment and imperfect overlap exists between the two pulses. Numerical simulations of a dynamical system show that contrast can still be extracted for significant angular misalignments accompanied by partial overlap between the two pulses.
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1850754
- Grant/Contract Number:
- SC0001805
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Synchrotron Radiation (Online)
- Additional Journal Information:
- Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 27; Journal Issue: 6; Journal ID: ISSN 1600-5775
- Publisher:
- International Union of Crystallography
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Instruments & Instrumentation; Optics; Physics; X-ray speckle visibility spectroscopy; contrast; angular misalignment
Citation Formats
Hua, Nelson, Zaluzhnyy, Ivan A., Hrkac, Stjepan B., Shabalin, Anatoly G., and Shpyrko, Oleg G. Extracting contrast in an X-ray speckle visibility spectroscopy experiment under imperfect conditions. United States: N. p., 2020.
Web. doi:10.1107/s1600577520012345.
Hua, Nelson, Zaluzhnyy, Ivan A., Hrkac, Stjepan B., Shabalin, Anatoly G., & Shpyrko, Oleg G. Extracting contrast in an X-ray speckle visibility spectroscopy experiment under imperfect conditions. United States. https://doi.org/10.1107/s1600577520012345
Hua, Nelson, Zaluzhnyy, Ivan A., Hrkac, Stjepan B., Shabalin, Anatoly G., and Shpyrko, Oleg G. Mon .
"Extracting contrast in an X-ray speckle visibility spectroscopy experiment under imperfect conditions". United States. https://doi.org/10.1107/s1600577520012345. https://www.osti.gov/servlets/purl/1850754.
@article{osti_1850754,
title = {Extracting contrast in an X-ray speckle visibility spectroscopy experiment under imperfect conditions},
author = {Hua, Nelson and Zaluzhnyy, Ivan A. and Hrkac, Stjepan B. and Shabalin, Anatoly G. and Shpyrko, Oleg G.},
abstractNote = {Pump–probe experiments at synchrotrons and free-electron lasers to study ultrafast dynamics in materials far from equilibrium have been well established, but techniques to investigate equilibrium dynamics on the nano- and pico-second timescales remain underdeveloped and experimentally challenging. A promising approach relies on a double-probe X-ray speckle visibility spectroscopy setup at split-and-delay beamlines of X-ray free-electron lasers. However, the logistics in consistently producing two collinear, perfectly overlapping pulses necessary to conduct a faithful experiment is difficult to achieve. In this paper, a method is introduced to extract contrast in the case where an angular misalignment and imperfect overlap exists between the two pulses. Numerical simulations of a dynamical system show that contrast can still be extracted for significant angular misalignments accompanied by partial overlap between the two pulses.},
doi = {10.1107/s1600577520012345},
journal = {Journal of Synchrotron Radiation (Online)},
number = 6,
volume = 27,
place = {United States},
year = {Mon Oct 19 00:00:00 EDT 2020},
month = {Mon Oct 19 00:00:00 EDT 2020}
}
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