Bulletin of the American Physical Society
APS March Meeting 2014
Volume 59, Number 1
Monday–Friday, March 3–7, 2014; Denver, Colorado
Session M26: Focus Session: Materials in Extremes: High-Strain-Rate Phenomena II
11:15 AM–2:03 PM,
Wednesday, March 5, 2014
Sponsoring Units: GSCCM DCOMP DMP
Chair: Bruce Remington, Lawrence Livermore National Laboratory
Abstract ID: BAPS.2014.MAR.M26.5
Abstract: M26.00005 : Progress on Understanding Structure and Compression of Laser Ramp-Compressed Matter into the Terapascal Pressure Regime*
12:27 PM–1:03 PM
Preview Abstract Abstract
(Lawrence Livermore Natl Lab)
Recent results from x-ray diffraction experiments at the Omega and NIF laser facilities on dynamically-compressed Sn, Ta, MgO, Pb and diamond will be presented. In order to relate laser ramp-compression results to the equilibrium phase diagram, it is necessary to understand the affects of the rapid compression on the phase transitions, microstructure and temperature of a material. To accomplish these measurements, a number of technical challenges must be overcome. The stress profile and history and the temperature of the sample need to be adequately controlled to make a measurement in a highly-compressed solid state, requiring precise laser pulse shaping and timing. Accurate understanding of the spectral emission from a plasma created during the laser ablation process is required in order to filter this emission and produce high contrast diffraction images. Progress towards understanding and resolving these scientific and technical issues will be discussed along with the experimental diffraction results.
*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.MAR.M26.5
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