论文标题
由于激光加速电子触发的极化而导致的超快目标充电
Ultrafast target charging due to polarization triggered by laser-accelerated electrons
论文作者
论文摘要
在短期激光脉冲与高电导率靶标的相互作用过程中，已经迈出了一个重要的步骤，以理解由喷射电子触发的瞬态表面电流的物理。与因真空快速丢失热电子的快速损失而导致的中和当前产生的普遍讨论的假设不同，所提出的机制与由于弹射电子触发的过渡辐射引起的电力极化对快速电流的激发有关。我们提出了一个相应的理论模型，并使用FDTD（有限差分时间域）和PIC（粒子中的粒子）方法将其与两个模拟模型进行比较。这两个模型都清楚地表明了所提出的理论的独特特征。
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.
