论文标题
轻型帆加速中的高能量和高质量的离子光束
High-Energy and High-Quality Ion beams in Light Sail Acceleration
论文作者
论文摘要
显着的激光脉冲照明薄固密度箔原则上可以加速整个箔，因此产生致密，准直和准单调的离子束。这些独特的功能在光帆方面呈现辐射压力加速度，一种有前途的加速机制，适用于需要密集和高速离子束的应用。然而，几种不稳定性的发作通常导致箔的变形和加热，从而导致辐射压力加速度阶段的过早终止和离子光谱的强烈扩大。在这里，我们表明（i）每个核能可实现的离子能量与不稳定性的发展之间存在关系，使得将离子能量增加导致横向调节效应的增加以及（ii），（ii）可以通过激光脉冲型参数适当匹配上述关系，从而使高效果构成高元素束具有高质量的效果。
A superintense laser pulse illuminating a thin solid-density foil can, in principle, accelerate the entire foil, therefore yielding dense, collimated, and quasi-monoenergetic ion beams. These unique features render radiation pressure acceleration in the light sail regime a promising acceleration mechanism suited for applications where dense and high-flux ion beams are required. However, the onset of several instabilities typically results into foil deformation and heating, which cause premature termination of the radiation pressure acceleration stage and strong broadening of the ion spectrum. Here we show that (i) a relation between the attainable ion energy per nucleon and the development of instabilities exists, such that increasing the ion energy results into an increase of transverse modulation effects and, (ii) that the above relation can be weakened with proper matching of laser pulse-foil parameters, such that high-energy dense ion beams with high-quality spectral features can be produced.
