Deuterium Equation of State Experiments at OMEGA
Abstract
Recent experimental studies have shown differences in the compressibility observed in deuterium depending on whether the drive was laser-driven ablation(G. W. Collins et al.), Science 281, 1178 (1998). or magnetic fields from a Z-pinch.(M. D. Knudson et al.), Phys. Rev. Lett. 87, 225501 (2001). To address this, the OMEGA laser was used to drive experiments employing a re-shock technique(A. N. Mostovych et al.), Phys. Plasmas 8, 2281 (2001). that accentuates differences in compressibility, enhancing our ability to discern the applicability of competing models. In these experiments, transparent anvil media (quartz) allow measurement of shock speeds using an optical VISAR, thus providing the high precision needed. We present results of preliminary experiments that initially shock cryogenic D2 (liquid) to pressures of ∼1.5 Mb and then to ∼7 Mb on reflection. This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC03-92SF19460.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- November 2002
- Bibcode:
- 2002APS..DPPCO2001B