We study the laser-driven generation of thermonuclear neutrons from targets with a microstructured surface in the form of deuterated microwires, using three-dimensional numerical simulation with previously obtained results of large-scale structural optimization of the target, which provides its best heating by femtosecond laser pulses of moderate intensity. We show that, for modern laser technologies, femtosecond lasers of low (several mJ) energy are even better for creating a neutron source than more powerful (∼1 J) lasers because the mode of high (∼1 kHz) pulse repetition rate is practically available. Microlayers (relief) and cylindrical microholes on the irradiated side are considered as alternative microstructured targets. For the latter, we demonstrate accumulation of ions on the axis of the holes, which leads to increase in the ion density above the initial value and consequently to a possible increase in the yield of thermonuclear neutrons.

我们使用三维数值模拟研究了具有氘化微丝形式的具有微结构表面的靶的激光驱动热核中子的产生，该三维数值模拟具有先前获得的靶的大规模结构优化结果，可以通过飞秒提供其最佳加热中等强度的激光脉冲。我们证明，对于现代激光技术，低（几mJ）能量的飞秒激光器比更强大（〜1 J）的激光器更能产生中子源，因为高（〜实际上可获得1 kHz）的脉冲重复率。辐照侧的微层（浮雕）和圆柱形微孔被认为是替代的微结构化靶材。对于后者，我们证明了离子在空穴轴上的积累，这导致离子密度增加到高于初始值，从而导致热核中子的产率可能增加。