Proton beams with energies beyond 100 MeV are essential for a wide range of applications, including modern cancer therapies. The generation of high-energetic protons beyond 100 MeV in experiments using PW-level laser pulses normally requires laser energies of 10–200 J. We propose an efficient hybrid scheme using tabletop (tens of TW) dual-laser pulses with laser energy of a few Joules with tandem solid density and near-critical density targets. The results of a 2D particle-in-cell simulation show that the combination acceleration scheme of the radiation pressure acceleration (RPA), laser wakefield acceleration (LWFA), and target normal sheath acceleration (TNSA) with the dual-pulses can considerably enhance the maximum proton energy to ∼220 MeV, which is nearly three times of the proton energy achieved by the RPA or the RPA-LWFA-TNSA using a single laser pulse.

中文翻译：

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使用桌面双激光脉冲产生 100 MeV 质子的高效混合加速方案

能量超过 100 MeV 的质子束对于包括现代癌症治疗在内的广泛应用至关重要。在使用 PW 级激光脉冲的实验中产生超过 100 MeV 的高能质子通常需要 10-200 J 的激光能量。我们提出了一种使用桌面（数十 TW）双激光脉冲的有效混合方案，激光能量为具有串联固体密度和近临界密度目标的少量焦耳。二维粒子细胞内模拟结果表明，辐射压力加速 (RPA)、激光尾场加速 (LWFA) 和目标法向鞘加速 (TNSA) 与双脉冲的组合加速方案可以显着提高最大质子能量为~220 MeV，