超热电子能量分布的实验和模拟研究

摘要

The dose produced by the hot electrons from the laser-foil target interaction has been measured by using a LiF thermoluminescence dosimeters (TLDs) stack. The hot electron energy distribution has been obtained from the mass stopping power of the electron in the LiF TLDs. The hot electron energy distribution of the PIC simulation is more consistent with the re-sult from the experiment. The theoretical analysis proves that the resonance absorption is the primary mechanism of the electron acceleration.%采用LiF探测器堆测量了飞秒激光-薄膜靶相互作用中超热电子产生的剂量.根据电子在LiF中的质量碰撞阻止本领,理论上计算出了超热电子的能量分布；在相同实验条件下,数值模拟结果与实验测量结果较好地一致,证明了实验测量的可靠性.理论分析显示,共振吸收是激光薄膜靶相互作用中电子加速的主要机制.