Ta ripple 10 keV 40 keV 40 keV High intensity laser 10 keV Mid-Z capsule Ta ripple 10 keV 40 keV 40 keV High intensity laser 10 keV Mid-Z capsule Mid-Z capsule Fig 1. Examples of high energy density experiments that require high energy backlighters on NIF. The left panel is for the material strength experiment where the ripple growth factors are measured via face-on radiography. (b) The right panel is the mid to high-Z capsule implosion experiments where capsule implosion symmetry will be

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... d. All require >40 keV radiography due to high areal density and the sample thickness. ABSTRACT High energy radiography capabilities are essential for many future DNT/HED experiments on NIF. We have been developing bright, high-energy (15-100 keV), high resolution (< 20 μm), 1-D and 2-D radiography solutions for DNT experiments on NIF. In this LDRD, we have made significant progress utilizing high-energy, high-intensity, short-pulse lasers to generate hard K-α photons. High energy K-α sources are created by hot electrons interacting in the target fluor material after irradiation by lasers with intensity I L >10 17 W/cm 2 . High resolution point projection 1-D and 2-D radiography have been achieved using μ-foil and μ-wire targets attached to low-Z substrate materials. The μ-wire size was 10 x 10 x 300 μm on a 300 x 300 x 5 μm CH substrate creating the point source size equivalent to these micro targets. This unique technique will utilize the NIF short pulse laser (ARC) as a backlighter suitable for the full range of DNT science experiments on NIF.