2005 14th APS Topical Conference on Shock Compression of Condensed Matter
Sunday–Friday, July 31–August 5 2005;
Baltimore, MD
Session B3: Focus Session: Ultra-High Pressure Shocks (P>>1 Mbar)
9:00 AM–10:30 AM,
Monday, August 1, 2005
Hyatt Regency
Room: Constellation D
Chair: Gilbert Collins, Lawrence Livermore National Laboratory
Abstract ID: BAPS.2005.SHOCK.B3.1
Abstract: B3.00001 : Creating Extreme Material Properties with High-Energy Laser Systems
9:00 AM–9:30 AM
Preview Abstract
Abstract
Author:
David Meyerhofer
(LLE, University of Rochester)
Laboratory for Laser Energetics, University of Rochester, 250 E. River Rd,
Rochester, NY 14623 High-energy laser systems create extreme states of
matter by coupling their energy into a target via ablation of the outer
layers. In planar experiments on the OMEGA laser system, single-shock
pressures can exceed 10 Mbar. In spherical geometry, the compressed target
pressures can be significantly higher than 1 Gbar. These pressures will be
increased by one or two orders of magnitude on the 1.8-MJ$_{UV}$ National
Ignition Facility, under construction at LLNL. The inherent flexibility of
multibeam laser systems allows many techniques to be applied to studying the
properties of materials under extreme conditions. Recent experiments have
used Extended X-ray Absorption Fine Structure to observe shock-induced phase
transformations in Fe on the ns time scale. Techniques are being used and/or
developed to measure the equation of state of compressed materials,
including solids, foams, and liquid D$_{2}$, both on and off the Hugoniot.
The coupling of high-energy petawatt (HEPW) lasers to high-energy laser
systems will greatly extend the accessible range of material conditions.
HEPW lasers produce extremely intense beams of electrons and protons that
can be coupled with high-energy compression to access a large region of
temperature and density space, for example, by heating a compressed target.
These beams, along with the extremely bright x-ray emission, provide new
diagnostic opportunities. This presentation will highlight some of the
recent advances and future opportunities in creating and measuring extreme
materials properties.
This work was supported by the U.S. Department of Energy Office of Inertial
Confinement Fusion under Cooperative Agreement No. DE-FC52-92SF19460, the
University of Rochester, and the NY State Energy Research and Development
Authority. The support of DOE does not constitute an endorsement by DOE of
the views expressed in this article.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.SHOCK.B3.1