HIF VNL Progress Report to DOE, April 22, 2005

TL;DRAbstract

We have made progress in learning to use the code Hydra to do detailed modeling of targets for Accelerator Driven High Energy Density Physics. Hydra is a state-of-the-art 3D, radiative transfer hydrodynamics modeling code developed at LLNL. In particular, we have carried out two-dimensional simulations of a 23 MeV, 1 mm radius Neon beam striking a 48 micron thick Aluminum foil at 10% solid density, and observed the heating of the foil by the beam. The Bragg peak was chosen to fall near the center of the foil, and as expected, rarefaction waves propagated symmetrically inward (at a speed of order the sound speed), as the heated material flowed outward and cooled. Foams allow relatively high temperatures to be attained over longer timescales, and the foils behaved, at least qualitatively, as predicted by previous analysis. Design of a number of configurations, ion species, and material compositions will be carried out using this code. Further, calculations by our collaborators at Tech-X

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