Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G00: Poster Session I (2pm- 5pm CST)
2:00 PM,
Tuesday, March 15, 2022
Room: McCormick Place Exhibit Hall F1
Abstract: G00.00093 : Structural transformation determination in Sodium Chloride during shock compression and release*
Presenter:
Vinay Rastogi
(Johns hopkins university)
Authors:
Vinay Rastogi
(Johns hopkins university)
Raymond F Smith
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Damian C Swift
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Richard Briggs
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Martin G Gorman
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Amy L Coleman
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Dayne E Fratanduono
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Jon H Eggert
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Cynthia A Bolme
(Los Alamos National Laboratory, Los Alamos, New Mexico, USA)
Federica Coppari
(Lawrence Livermore National Laboratory, Livermore, CA, USA)
Arianna Gleason
(Linac Coherent Light Source, SLAC National Accelerator Laboratory, CA, USA)
Hae Ja Lee
(Linac Coherent Light Source, SLAC National Accelerator Laboratory, CA, USA)
Phil Heimann
(Linac Coherent Light Source, SLAC National Accelerator Laboratory, CA, USA)
Thomas S Duffy
(Dept. of Geosciences, Princeton University, Princeton, NJ 08540, USA)
June K Wicks
(Johns Hopkins University, MD, USA)
Collaboration:
We thank Carol Davis and the Target Fabrication Team at Lawrence Livermore National Laboratory for the target fabrication. We are also very thankful to the operations staff of the Matter in Extreme Conditions Beamline at the
Sodium chloride (NaCl) is a fundamental ionic solid of significant interest for high-pressure science, geoscience, and dynamic compression studies. The B1-B2 phase transition shown by NaCl occurs widely among binary compounds and thus NaCl is used as a model system for understanding the rich physics behind these types of phase transitions. In this work, we shock compressed and released the single-crystal NaCl [100] samples to study the B1↔B2 phase transitions over nanosecond timescales at the X-ray free-electron laser (XFEL) facility at LCLS. Both solid-solid (B1→B2) and solid-liquid (B2→melt) phase transitions have been observed along the shock Hugoniot. A multi-phase equation-of-state (EOS) description of NaCl is incorporated into a one-dimensional hydrocode (HYADES) and is used to interpret the pressure evolution inside the sample over these rapid timescales. To constrain the phase diagram of NaCl at high pressure (P) and high-temperature (T), we combine the measured crystal structures and density with the calculated EOS and determine a P-T path consistent with the reported Hugoniot data.
Keywords: Laser-Shock, Phase diagram, Equation-of-state, Velocimetry, X-ray diffraction.
*This work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under contract number DE-AC52- 07NA27344.
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