标题： 激光产生电子对等离子体的尺度化与实验数据的比较 显示英文标题

标题： Scaling of Laser Produced Pair Plasmas And Comparison With Experimental Data

摘要： 我们报告使用GEANT4蒙特卡罗代码对超强激光照射金靶时的电子对产生模拟结果。 正电子和电子能量谱的某些实验特征得到了再现，同时再现了靶厚度和热电子温度Te的相关趋势。 对于Te在5-10 MeV范围内，电子对产生的最佳靶厚度约为3毫米。 进一步的蒙特卡罗模拟可能有助于优化激光驱动的正电子源。 显示英文摘要

摘要： We report simulation results of pair production by ultra-intense lasers irradiating a gold target using the GEANT4 Monte-Carlo code. Certain experimental features of the positron and electron energy spectra are reproduced, as well as trends with regard to target thickness and hot electron temperature Te. For Te in the range 5-10 MeV, the optimal target thickness for pair production is found to be about 3 mm. Further Monte-Carlo simulations may aid in the optimization of laser-driven positron sources.