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利用一维辐射流体力学程序MULTI数值模拟研究了功率为 10 1 4 W cm2 、脉冲宽度为 30 0ps、波长为 0 .44 μm的强激光辐照平面Au靶时产生X射线的过程 ,给出了X射线转换效率和能谱分布 .通过将靶物质划分为对所产生的X射线光学薄的转化区和光学厚的再发射区 ,得到了作为黑体辐射热源的最佳靶厚度 ,并给出了辐射加热靶所产生的等离子体的密度和温度的空间分布 .
The process of X-ray generation when a strong laser with a power of 10 1 4 W cm2, a pulse width of 30 0 ps and a wavelength of 0.44 μm was irradiated on a planar Au target was studied by using the one-dimensional radiodynamics MULTI numerical simulation. X-ray conversion efficiency and energy spectrum distribution. By dividing the target material into the optically thin conversion zone for the generated X-rays and the optically thick re-emitting zone, the optimum target thickness as a black body radiation heat source is obtained, Spatial distribution of density and temperature of the plasma generated by radiation heating of the target.