Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session UO06: Warm Dense Matter
2:00 PM–5:00 PM,
Thursday, October 20, 2022
Room: Ballroom 111 C
Chair: Suxing Hu, LLE
Abstract: UO06.00007 : Investigation of phonon hardening in laser-excited gold using in-situ single-shot X-ray diffraction at the LCLS.*
3:12 PM–3:24 PM
Presenter:
Adrien Descamps
(SLAC - Natl Accelerator Lab)
Authors:
Adrien Descamps
(SLAC - Natl Accelerator Lab)
Benjamin K Ofori-Okai
(SLAC - Natl Accelerator Lab)
Zhijiang Chen
(SLAC - Natl Accelerator Lab)
Luke Fletcher
(SLAC - Natl Accelerator Lab)
Siegfried H Glenzer
(SLAC - Natl Accelerator Lab)
Nicholas J Hartley
(SLAC - Natl Accelerator Lab)
Jerome B Hastings
(SLAC - Natl Accelerator Lab)
Dimitri Khaghani
(SLAC - Natl Accelerator Lab)
Mianzhen Mo
(SLAC - Natl Accelerator Lab)
Bob Nagler
(SLAC - Natl Accelerator Lab)
Vanina Recoules
(CEA DAM lle-de-France)
Ronald A Redmer
(Institut für Physik, Universität Rostock)
Maximilian Schörner
(Institut für Physik, Universität Rostock)
Peihao Sun
(SLAC - Natl Accelerator Lab)
Thomas G White
(University of Nevada, Reno)
Emma E McBride
(SLAC - Natl Accelerator Lab)
Previous studies have claimed evidence of the stiffening of the interatomic potential using ultrafast electron [3]. However, recent modelling, which do not assume phonon hardening, were also able to reproduce these experimental [2]. As a result, the experimental observation of phonon hardening in laser excited Au is still debated. Here, we investigate phonon hardening describe through X-ray diffraction at a hard XFEL to measure the temporal evolution of several diffraction lines at a higher absorbed energy density than previously reported.
[1] Recoules, V., et. al. (2006). Physical Review Letters, 96(5), 1–4.
[2] Smirnov, N. A. (2020. Physical Review B, 101(9), 1–11.
[3] Ernstorfer, R., et. al. (2009) Science, 323(5917), 1033–1037.
*This work is supported by the DOE Office of Science, Fusion Energy Science under FWP 100182 and FWP 100705, and by the Laboratory Directed Research and Development program at SLAC National Accelerator Laboratory, under contract DE-AC02-76SF00515 and as part of the Panofsky Fellowship awarded to BOO.
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