Proton Acceleration Driven by a Nanosecond Laser from a Cryogenic Thin Solid-Hydrogen Ribbon


 A high-power pulsed laser is focused onto a solid-hydrogen target to accelerate forward a collimated stream of protons in the range 0.1–1 MeV. This result is achieved for the first time through the combination of a sophisticated target system (H2 thin ribbon) operating at cryogenic temperature (∼10 K). Both the H plasma and the accelerated proton beam are fully characterized by in situ and ex situ diagnostics.

Recorded raw interferometry snapshots corresponding plasma density maps.