High resolution >40 keV x-ray radiography using an edge-on micro-flag backlighter at NIF-ARC
Abstract
We present radiographic data and modulation transfer function (MTF) analyses of a multi-component test object probed at an effective backlighter energy >40 keV using a 5 μm-thin dysprosium foil driven by the NIF-ARC short pulse laser (~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.
This work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contact No. DE-AC52-07NA27344.- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DPPZ03007H