High resolution \textgreater 40 keV x-ray radiography using an edge-on micro-flag backlighter at NIF-ARC

We present radiographic data and modulation transfer function (MTF) analyses of a multi-component test object probed at an effective backlighter energy \textgreater 40 keV using a 5 $\mu $m-thin dysprosium foil driven by the NIF-ARC short pulse laser (\textasciitilde 2 kJ, 10 ps). The thin edge of the foil acts as a bright line source of hard x-rays which is placed in a point-projection configuration with the test object and a filtered and shielded image plate detector stack. The system demonstrates superior spatial and temporal resolution when compared to an existing long-pulse-driven backlighter now used routinely at NIF for dynamic strength experiments, using only a small fraction of the laser energy and fewer beamlines.