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 ∼1015W/cm2 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 2×1014 to 1015W/cm2. The standard local thermal-transport model with a constant flux limiter of 0.06 disagrees with experimental measurements at a high intensity of ∼1015W/cm2 but agrees at lower intensities. These results show the significance of nonlocal effects for direct-drive ignition designs.