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Article Dans Une Revue New Journal of Physics Année : 2021

Efficient laser-driven proton and bremsstrahlung generation from cluster-assembled foam targets

Irene Prencipe
Andrea Pazzaglia
David Dellasega
Arianna Formenti
Thomas Kluge
Stephan Kraft
Alessandro Maffini
Karl Zeil
Matteo Passoni

Résumé

The interaction between intense 30 fs laser pulses and foam-coated 1.5 μm-thick Al foils in the relativistic regime (up to 5 × 10$^{20}$ W cm$^{−2}$ ) is studied to optimize the laser energy conversion into laser-accelerated protons. A significant enhancement is observed for foam targets in terms of proton cut-off energy (18.5 MeV) and number of protons above 4.7 MeV (4 × 10$^9$ protons/shot) with respect to uncoated foils (9.5 MeV, 1 × 10$^9$ protons/shot), together with a sixfold increase in the bremsstrahlung yield. This enhancement is attributed to increased laser absorption and electron generation in the foam meso- and nanostructure.

Dates et versions

cea-04453434 , version 1 (12-02-2024)

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Irene Prencipe, Josefine Metzkes-Ng, Andrea Pazzaglia, Constantin Bernert, David Dellasega, et al.. Efficient laser-driven proton and bremsstrahlung generation from cluster-assembled foam targets. New Journal of Physics, 2021, 23 (9), pp.093015. ⟨10.1088/1367-2630/ac1fcd⟩. ⟨cea-04453434⟩
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