Laser ion acceleration from tailored solid targets with micron-scale channels

K. Lezhnin, S. V. Bulanov
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引用次数: 1

Abstract

Laser ion acceleration is a promising concept for generation of fast ions using a compact laser-solid interaction setup. In this study, we theoretically investigate the feasibility of ion acceleration from the interaction of petawatt-scale laser pulses with a structured target that embodies a micron-scale channel filled with relativistically transparent plasma. Using 2D and 3D Particle-In-Cell (PIC) simulations and theoretical estimates, we show that it is possible to generate GeV protons with high volumetric charge and quasi-monoenergetic feature in the energy spectrum. We interpret the acceleration mechanism as a combination of Target Normal Sheath Acceleration and Radiation Pressure Acceleration. Optimal parameters of the target are formulated theoretically and verified using 2D PIC simulations. 3D PIC simulations and realistic preplasma profile runs with 2D PIC show the feasibility of the presented laser ion acceleration scheme for the experimental implementation at the currently available petawatt laser facilities.
具有微米级通道的定制固体目标的激光离子加速
激光离子加速是利用紧凑的激光-固体相互作用装置产生快速离子的一个有前途的概念。在这项研究中,我们从理论上探讨了离子加速的可行性,从千瓦级激光脉冲与结构目标的相互作用,包含一个微米级通道,充满相对透明的等离子体。利用二维和三维的PIC模拟和理论估计,我们证明了在能谱上产生具有高体积电荷和准单能特征的GeV质子是可能的。我们将加速机制解释为目标正常鞘层加速和辐射压力加速的结合。从理论上推导了目标的最优参数,并通过二维PIC仿真进行了验证。三维PIC模拟和二维PIC实际预等离子体剖面的运行表明,所提出的激光离子加速方案在现有的千瓦激光设备上实验实施的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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