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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
Published on: May 2, 2016
Validation of thermal-transport modeling with direct-drive, planar-foil acceleration experiments on OMEGA
S X Hu1, V A Smalyuk, V N Goncharov
1Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623, USA. shu@lle.rochester.edu
Abstract:
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.
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