Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot-Lau deflectometry
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Diagnosing the evolution of laser-generated high energy density (HED) systems is fundamental to develop a correct understanding of the behavior of matter under extreme conditions. Talbot-Lau interferometry constitutes a promising tool, since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense plasmas. We present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot-Lau X-ray interferometer. A polystyrene (CH) foil was irradiated by a laser of 133 J, 1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser (153 J, 11 ps). The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using phase-stepping. We managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above. These results showcase the capabilities of Talbot-Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.
Details
Original language | English |
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Article number | e49 |
Journal | High power laser science and engineering |
Volume | 11 |
Publication status | Published - 26 May 2023 |
Peer-reviewed | Yes |
Keywords
ASJC Scopus subject areas
Keywords
- deflectometry, OMEGA EP, phase-contrast imaging, Talbot-Lau, X-ray interferometry