论文标题
带有微米级通道的量身定制固体目标的激光离子加速度
Laser ion acceleration from tailored solid targets with micron-scale channels
论文作者
论文摘要
激光离子加速度是使用紧凑的激光固体相互作用设置来生成快速离子的一个有前途的概念。在这项研究中，我们从理论上研究了从Petawatt尺度激光脉冲与结构化靶标的相互作用的离子加速度的可行性，该靶标体现了一个微米级通道，填充了相对透明的等离子体。使用2D和3D粒子中的模拟和理论估计值，我们表明可以在能量谱中生成具有高体积电荷和准单调特征的GEV质子。我们将加速机制解释为目标正常鞘加速度和辐射压力加速度的组合。使用2D PIC模拟对目标的最佳参数进行理论配方和验证。 3D PIC仿真和现实的预浮力曲线以2D PIC运行，显示了当前可用的Petawatt Laser设施中提出的激光离子加速度方案用于实验实现的可行性。
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.
