Validation of thermal-transport modeling with direct-drive, planar-foil acceleration experiments on OMEGA.
We present for the first time the experimental validation of the nonlocal thermal-transport model for a National Ignition Facility relevant laser intensity of approximately 10(15) W/cm(2) on OMEGA. The measured thin target trajectories are in good agreement with predictions based on the nonlocal model over the full range of laser intensities from 2 x 10(14) to 10(15) W/cm(2}) The standard local thermal-transport model with a constant flux limiter of 0.06 disagrees with experimental measurements at a high intensity of approximately 10(15) W/cm(2) but agrees at lower intensities. These results show the significance of nonlocal effects for direct-drive ignition designs.
Hu
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Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623, USA. shu@lle.rochester.edu
Smalyuk
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Goncharov
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Skupsky
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Sangster
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Meyerhofer
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Shvarts
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