Multi-MeV quasi-mono-energetic electron beam generation from interaction of ultraintense laser pulse with solid target at grazing incidence

摘要

Generation of a quasi-mono-energetic electron beam with peak energy similar to 3 MeV and full cone divergence angle of similar to 3A degrees is observed in the interaction of 45 fs, 3 TW Ti:sapphire laser beam incident on a planar carbon target surface at grazing incidence. The collimated and quasi-mono-energetic electron beam was observed when a pre-pulse pedestal of 1-ns duration was used with the main 45-fs laser pulse. The study presented on generation of spatially and spectrally concentrated multi-MeV electron beam along solid target surface could be of significance for current areas of research like fast ignition scheme of inertial confinement fusion.