Enhancement of the maximum proton energy by funnel-geometry target in laser–plasma interactions

Yang, Peng; Fan, Dapeng; Li, Yuxiao

doi:10.1016/j.physa.2016.03.110

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…[12] To suppress the proton beam divergence, various targets with tailored rear surfaces have been proposed, such as holed rear surface, [13−14] umbrella-like rear surface, [15] and funnel-shaped rear surface. [16] During the past decades, some mechanisms for the generation of laser-driven proton beam have been proposed. For example, the target normal sheath acceleration (TNSA), [17] radiation pressure acceleration (RPA), [18] shock wave acceleration (SWA), [19] and so on.…”

Section: Introductionmentioning

confidence: 99%

Proton Beam Generated by Multi-Lasers Interaction with Rear-Holed Target

Yang¹,

Fan²,

Li³

2017

Commun. Theor. Phys.

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Multi-lasers are proposed to enhance the proton acceleration in laser plasma interaction. A rear-holed target is illuminated by three lasers from different directions. The scheme is demonstrated by two-dimensional particle-in-cell simulations. The electron cloud shape is controlled well and the electron density is improved significantly. The electrons accelerated by the three lasers induce an enhanced target normal sheath acceleration (TNSA) which suppresses the proton beam divergence and improves the maximum proton energy. The maximum proton energy is 22.9 MeV, which increased significantly than that of a single-laser target interaction. Meanwhile, the average divergence angle (22.3°) is reduced. The dependence of the proton beam on the length of sidewall is investigated in detail and the optimal length is obtained.

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