Acceleration of laser-driven ion bunch from double-layer thin foils
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Generation of monoenergetic ion bunch from a double-layer thin-foil target irradiated by an intense linearly polarized laser pulse is investigated using two-dimensional particle-in-cell simulation. The protons in the front low-density hydrogen target layer accelerated by the space-charge field of the laser-driven hot electrons can penetrate through the high-Z high-mass and high-density ion layer, resulting in an energetic proton bunch. A part of the latter is further accelerated by the space-charge field of the hot electrons in the vacuum behind the high-Z ion layer. With this scheme, quasimonoenergetic proton bunches can be produced using presently available laser pulses of moderate contrast and duration
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Wang, X., Yu, W., Liang, E., et al.. "Acceleration of laser-driven ion bunch from double-layer thin foils." Physics of Plasmas, 19, (2012) American Institute of Physics: 53110. http://dx.doi.org/10.1063/1.4714613.