Spectrally peaked proton beams shock accelerated from an optically shaped overdense gas jet by a near-infrared laser

George S. Hicks, Oliver C. Ettlinger, Marco Borghesi +10

We report on the generation of impurity-free proton beams from an overdense gas jet driven by a near-infrared laser (${\lambda }_L=1.053$ $\mu m$). The gas profile was shaped prior to…