论文标题
纳米线阵列的体积加热使用kilojoule-scale petawatt激光相互作用
Volumetric heating of nanowire arrays to keV temperatures using kilojoule-scale petawatt laser interactions
论文作者
论文摘要
我们提出了从400 nm直径的镍纳米线阵列中分辨率的k-shell光谱，这表明当与最大的短脉冲激光器的典型较长脉冲结合使用时，可以产生大量的高能量血浆。在用100 j，600 fs超高的激光脉冲辐照电线阵列之后，在猎户座激光设施上，我们在猎户座激光设施上进行了原子素材模型与2D碰撞粒子的样本相结合，以供应量级的素材，我们将原子动力学结合起来。与在近固密度的血浆中持续的固定箔相比，我们观察到氦样发射的三倍增强，这是数十秒钟的keV温度，这是由于强大的电流电流加热电线并导致电线爆炸和碰撞的结果。
We present picosecond-resolution streaked K-shell spectra from 400 nm-diameter nickel nanowire arrays, demonstrating the ability to generate large volumes of high energy density plasma when combined with the longer pulses typical of the largest short pulse lasers. After irradiating the wire array with 100 J, 600 fs ultra-high-contrast laser pulses focussed to $>10^{20}$ W/cm$^{2}$ at the Orion laser facility, we combine atomic kinetics modeling of the streaked spectra with 2D collisional particle-in-cell simulations to describe the evolution of material conditions within these samples for the first time. We observe a three-fold enhancement of helium-like emission compared to a flat foil in a near-solid-density plasma sustaining keV temperatures for tens of picoseconds, the result of strong electric return currents heating the wires and causing them to explode and collide.
