Generation of quasi-monoenergetic heavy ion beams via staged shock wave acceleration driven by intense laser pulses in near-critical plasmas

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Abstract

Laser-driven ion acceleration potentially offers a compact, cost-effective alternative to conventional accelerators for scientific, technological, and health-care applications. A novel scheme for heavy ion acceleration in near-critical plasmas via staged shock waves driven by intense laser pulses is proposed, where, in front of the heavy ion target, a light ion layer is used for launching a high-speed electrostatic shock wave. This shock is enhanced at the interface before it is transmitted into the heavy ion plasmas. Monoenergetic heavy ion beam with much higher energy can be generated by the transmitted shock, comparing to the shock wave acceleration in pure heavy ion target. Two-dimensional particle-in-cell simulations showthat quasi-monoenergetic C6+ ion beamswith peak energy 168MeVand considerable particle number 2.1 × 1011 are obtained by laser pulses at intensity of 1.66 × 1020 W cm-2 in such staged shockwave acceleration scheme. Similarly a high-quality Al10+ ion beamwith awell-defined peakwith energy 250MeVand spread δE E0 = 30%can also be obtained in this scheme.

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Zhang, W. L., Qiao, B., Shen, X. F., You, W. Y., Huang, T. W., Yan, X. Q., … He, X. T. (2016). Generation of quasi-monoenergetic heavy ion beams via staged shock wave acceleration driven by intense laser pulses in near-critical plasmas. New Journal of Physics, 18(9). https://doi.org/10.1088/1367-2630/18/9/093029

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