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本文提出用固体靶前放置薄膜靶来实现激光场放大的新方案,研究了针对单束激光脉冲条件的俘获及放大机理.理论模型与数值模拟均表明入射激光能量可以部分地以驻波形式驻留在靶间区域并得到有效放大.研究表明在入射激光光压、俘获激光光压和电荷分离场的共同作用下,薄膜靶电子层压缩和膨胀是能量积累存在反复振荡过程的直接原因,经过振荡后激光脉冲得到稳定俘获.
In this paper, we propose a new scheme to enlarge the laser field by using a thin film target placed in front of a solid target, and study the capture and amplification mechanism for the single laser pulse. Both the theoretical model and the numerical simulation show that the incident laser energy can be partly in the form of a standing wave And stay in the target area and get effective amplification.The results show that under the combined action of incident laser light pressure, trapped laser light pressure and charge separation field, the compression and expansion of the target electronic layer of the film are the direct causes of the repeated oscillation process of energy accumulation. After the laser pulse laser oscillation was stable capture.