由laser加速电子引发的极化引起的超快靶充电
Ultrafast target charging due to polarization triggered by laser-accelerated electrons
摘要：
一个重要的一步已经朝着理解的瞬态表面电流的物理过程中的一个短的强激光脉冲与高电导率的目标相互作用的喷射电子触发。不同于通常讨论的假设的中性化电流产生的结果的快速损失的热电子到真空中，所提出的机制是与激发的快速电流的电极化的强度由于跃迁辐射触发的喷射电子。我们提出了一个相应的理论模型，并比较它与两个仿真模型，使用时域有限差分法（FDTD）和粒子在细胞（PIC）的方法。所提出的理论的显着特点是清楚地表现在这两个模型。
英文摘要：
A significant step has been made towards understanding the physics of the transient surface current triggered by ejected electrons during the interaction of a short intense laser pulse with a high-conductivity target. Unlike the commonly discussed hypothesis of neutralization current generation as a result of the fast loss of hot electrons to the vacuum, the proposed mechanism is associated with excitation of the fast current by electric polarization due to transition radiation triggered by ejected electrons. We present a corresponding theoretical model and compare it with two simulation models using the FDTD (finite-difference time-domain) and PIC (particle-in-cell) methods. Distinctive features of the proposed theory are clearly manifested in both of these models.
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