Stable laser-produced quasimonoenergetic proton beams from interactive laser and target shaping

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Liu, J. L. and Chen, M. and Sheng, Z. M. and Liu, C. S. and Mori, W. B. and Zhang, J. (2013) Stable laser-produced quasimonoenergetic proton beams from interactive laser and target shaping. Physical Review Special Topics: Accelerators and Beams, 16 (12). 121301. ISSN 1098-4402 (https://doi.org/10.1103/PhysRevSTAB.16.121301)

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Abstract

In radiation pressure dominated laser ion acceleration schemes, transverse target deformation and Rayleigh-Taylor (RT)-like instability always develop quickly, break the acceleration structure, limit the final accelerated ion energy, and lower the beam quality. To overcome these issues, we propose a target design named dual parabola targets consisting of a lateral thick part and a middle thin part, each with a parabolic front surface of different focus positions. By using such a target, through interactive laser and target shaping processes, the central part of the thin target will detach from the whole target and a microtarget is formed. This enables the stable acceleration of the central part of the target to high energy with high quality since usual target deformation and RT-like instabilities with planar targets are suppressed. Furthermore, this target design reduces the laser intensity required to optimize radiation pressure acceleration by more than 1 order of magnitude compared to normal flat targets with similar thickness and density. Two-dimensional particle-in-cell simulations indicate that a quasimonoenergetic proton beam with peak energy over 200 MeV and energy spread around 2% can be generated when such a solid target (with density 400nc and target thickness 0.5λ0) is irradiated by a 100 fs long circularly polarized laser pulse at focused intensity IL∼9.2×1021 W/cm2.

ORCID iDs

Liu, J. L., Chen, M., Sheng, Z. M. ORCID logoORCID: https://orcid.org/0000-0002-8823-9993, Liu, C. S., Mori, W. B. and Zhang, J.;
  • Item type:Article
    ID code:49207
    Dates:
    Date
    Event
    5 December 2013
    Published
    Notes:Copyright American Physical Society (APS)
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:15 Sep 2014 08:26
    Last modified:11 Nov 2024 10:46
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/49207
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