论文标题
表面等离子驱动的电子和质子加速度而无需光栅耦合
Surface Plasmon-Driven Electron and Proton Acceleration without Grating Coupling
论文作者
论文摘要
可以利用强烈激光相互作用的表面等离子体（SP）激发，以增强次级排放，特别是高电荷电子束的有效加速。先前的研究主要使用光栅耦合来允许SP激发，这需要严格的激光对比条件以保持目标的结构完整性。在这里，我们通过模拟显示，当前可用的短脉冲激光器的有效SP电子加速度可能发生在平行或放牧的发射率（$ \ sim 5^\ circ $与目标表面）的平面箔中发生，而无需表面调制。反过来，加速电子对于当前可用的激光驱动器的狭窄光谱的产生质量峰值可有效。
Surface plasmon (SP) excitation in intense laser interaction with solid target can be exploited for enhancing secondary emissions, in particular efficient acceleration of high charge electron bunches. Previous studies have mostly used grating coupling to allow SP excitation, which requires stringent laser contrast conditions to preserve the structural integrity of the target. Here we show via simulations that efficient SP electron acceleration for currently available short pulse lasers can occur in a flat foil irradiated at parallel or grazing incidence ($\sim 5^\circ$ with the target surface) without a surface modulation. In turn, the accelerated electrons can be effective for generating proton beams with narrow spectra peaked at $>$100 MeV energies for currently available laser drivers.
