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arXiv 2201.06549physics.plasm-ph
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利用微米级通道的定制固体靶加速Laser离子

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

K. V. Lezhnin, S. V. Bulanov

摘要:

激光离子加速是利用激光与固体相互作用产生快离子的一种很有前途的方法。在这项研究中,我们从理论上研究了从拍瓦级激光脉冲与结构化目标的相互作用中加速离子的可行性,该结构化目标体现了一个充满相对论透明等离子体的微米级通道。利用二维和三维粒子模拟和理论估计,我们表明,这是可能的,产生GeV质子具有高体积电荷和准单能的功能,在能谱。我们将加速机制解释为目标正常鞘层加速度和辐射压力加速度的组合。最佳参数的目标制定理论和验证使用2D PIC模拟。三维PIC模拟和现实preplasma轮廓运行与二维PIC显示的可行性,目前可用的拍瓦激光设施的实验实施所提出的激光离子加速方案。

英文摘要:

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.

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