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利用轴对称二维数值模拟程序Lared I,对两端单环激光入射产生的辐射场驱动下的靶球进行了数值模拟 ,给出了靶球二维变形的计算结果。随着入射激光焦斑位置的改变 ,辐射场在靶球表面的温度分布随之相应改变 ,驱动靶球内爆压缩氘气区分别成为铁饼形、香肠形或球形。将数值模拟结果与美国LLNL实验室的实验结果及其Lasnex程序的数值模拟结果进行了比对 ,得到了定性上完全相同的结论和接近的数值结果。从数值模拟结果可以看出 ,在单环入射的情况下 ,尚无法消除辐射场的高阶不对称性 ,无法满足球形对称均匀压缩的要求
Using the axisymmetric 2D numerical simulation program Lared I, the target sphere driven by the radiation field generated by the single-ring laser incident on both ends is numerically simulated, and the calculation results of the two-dimensional deformation of the target sphere are given. As the position of the incident laser focal spot changes, the temperature distribution of the radiation field on the surface of the target sphere changes correspondingly, and the impinging deuterium gas area of the target ball implodes into the shape of discus, sausage or sphere, respectively. The results of numerical simulation are compared with the experimental results of LLNL laboratory in the United States and the numerical simulation results of Lasnex program. The qualitatively identical conclusions and numerical results are obtained. It can be seen from the numerical simulation results that in the case of single-ring incident, the high-order asymmetry of the radiation field can not be eliminated and the uniform symmetric spherical symmetric compression can not be satisfied