Supernova-relevant hydrodynamic instability experiment on the Nova laser

Details Supernova-relevant hydrodynamic instability experiment on the Nova laser Supernova-relevant hydrodynamic instability experiment on the Nova laser

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996stin...9630650k&link_type=abstract

Conference Paper, Workshop In Astrophysics Experiments with Large Lasers

Astronomy and Astrophysics

Astrophysics

Supernova 1987A, Computerized Simulation, Data Acquisition, Convection, Star Formation, Supernovae, Hydrodynamics, Lasers, Evolution (Development), Perturbation, Stability

Scientific paper

Supernova 1987A focused attention on the critical role of hydrodynamic instabilities in the evolution of supernovae. On quite a separate front, the detrimental effect of hydrodynamic instabilities in Inertial Confinement Fusion (ICF) has long been known. Tools from both areas are being tested on a common project. At Lawrence Livermore National Laboratory (LLNL), the Nova Laser is being used in scaled laboratory experiments of hydrodynamic mixing under supernova-relevant conditions. Numerical simulations of the experiments are being done, using hydrodynamics codes at the Laboratory, and astrophysical codes successfully used to model the hydrodynamics of supernovae. A two-layer package composed of Cu and CH2 with a single mode sinusoidal 1D perturbation at the interface, shocked by indirect laser drive from the Cu side of the package, produced significant Rayleigh-Taylor (RT) growth in the nonlinear regime. The scale and gross structure of the growth was successfully modeled, by mapping an early-time simulation done with 1D HYADES, a radiation transport code, into 2D CALE, a LLNL hydrodynamics code. The HYADES result was also mapped in 2D into the supernova code PROMETHEUS, which was also able to reproduce the scale and gross structure of the growth.

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