Simultaneous PW-scale laser driven MeV X-ray and neutron beam characterization for dual radiography capability

Laser-driven, high-brilliance secondary sources (electrons, ions, neutrons, X-rays) open new perspectives for compact material probing and imaging of high-speed events. A key advantage is their ability to perform multiplexed probing, as these sources are generated simultaneously in a single shot using a single laser beam. Here, we report the first quantitative measurements of photon spectra (0.1–100 MeV) and angular distributions in the petawatt interaction regime, using an ultra-intense ($>{10}^{21}\mathrm{W}\mathrm{/}\mathrm{c}{\mathrm{m}}^2$), ultra-short (24~fs) laser pulse. These results are complemented by the characterization of simultaneously produced MeV neutrons. We demonstrate that these neutrons, once moderated, can enable in-depth material identification via resonance transmission analysis. This work highlights the potential of compact, ultrashort-pulse PW lasers for dual neutron and X-ray radiography of dense materials.