Multiple lasers interacting with a deuterated (D) pitcher-catcher target and neutron generation are investigated using two-dimensional hybrid particle-in-cell and Monte Carlo simulations. It is found that when multiple laser pulses are focused on the front surface of the pitcher layer, D+ ion acceleration by target normal sheath acceleration (TNSA) is enhanced by the interfering overlapped light fields and the resulting periodic target-surface structure. With three laser pulses each of 4.5×1019 W/cm2 intensity, 33 fs duration and ~160 mJ energy, focusing at suitable angles on the pitcher layer, one can obtain 15 MeV D+ ions and ~25% laser-to-D+ ions energy conversion efficiency. As the resulting high-energy-density D+ ions bombard the catcher layer, D-D fusion reactions are triggered. About 3.6×107 neutrons can be produced, with the maximum neutron production rate as high as 3.1×1036 m-3s-1, almost an order of magnitude higher than that from a single laser of the same total energy.

中文翻译：

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多激光与投手-捕手目标相互作用驱动的高能氘离子束和中子源

使用二维混合细胞内粒子和蒙特卡罗模拟研究了与氘化 (D) 投手-捕手目标和中子生成相互作用的多个激光器。发现当多个激光脉冲聚焦在笼层的前表面时，目标法向鞘层加速 (TNSA) 的 D+ 离子加速被干扰重叠光场和由此产生的周期性目标表面结构增强。三个激光脉冲，每个脉冲强度为 4.5×1019 W/cm2，持续时间为 33 fs 和~160 mJ 能量，以合适的角度聚焦在捕集层上，一个可以获得 15 MeV D+ 离子和~25% 激光到 D+ 离子能量转换效率。随着由此产生的高能量密度 D+ 离子轰击捕集层，DD 聚变反应被触发。大约可以产生3.6×107个中子，