Astrophysically Relevant Instabilities at a Decelerating Interface.

Details Astrophysically Relevant Instabilities at a Decelerating Interface. Astrophysically Relevant Instabilities at a Decelerating Interface.

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppbp1078c&link_type=abstract

American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre

Physics

Plasma Physics

Scientific paper

Hydrodynamic instabilities play an important role in many astrophysical phenomena, and modern intense lasers offer the chance to experimentally investigate these instabilities in similar environments in a laboratory. In this poster, we report on experimental and theoretical progress in ongoing research in laser astrophysics. We presents results of simulations of experiments performed using the University of Rochester's Omega laser facility. These experiments involve shock propagation through multi-layer targets, and are designed to replicate the complex hydrodynamic instabilities thought to arise during supernovae explosions. The simulations were performed with the FLASH code, developed by the ASCI/ASAP Center for Astrophysical Thermonuclear Flashes at the University of Chicago, and we are planning on a study making use of a realistic equation of state. We present results of an experimental study of 2-D vs. 3-D perturbation growth rates also performed at the Omega laser facility. Data from experiments with nominally identical two-layer targets, but 2-D or 3-D perturbations, show clear differences between the evolution of 2-D vs. 3-D perturbations. We also present simulations showing qualitatively similar features for comparison. This work is supported by the US Department of Energy.

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