Browsing by Author "Pfotenhauer, S.M."

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    A cascaded laser acceleration scheme for the generation of spectrally controlled proton beams
    (College Park, MD : Institute of Physics Publishing, 2010) Pfotenhauer, S.M.; Jäckel, O.; Polz, J.; Steinke, S.; Schlenvoigt, H.-P.; Heymann, J.; Robinson, A.P.L.; Kaluza, M.C.
    We present a novel, cascaded acceleration scheme for the generation of spectrally controlled ion beams using a laser-based accelerator in a 'double-stage' setup. An MeV proton beam produced during a relativistic laser-plasma interaction on a thin foil target is spectrally shaped by a secondary laser-plasma interaction on a separate foil, reliably creating well-separated quasi-monoenergetic features in the energy spectrum. The observed modulations are fully explained by a one-dimensional (1D) model supported by numerical simulations. These findings demonstrate that laser acceleration can, in principle, be applied in an additive manner. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.