Design of laser pulse shapes and target structures by random optimization for direct-drive inertial confinement fusion
Design of laser pulse shapes and target structures by random optimization for direct-drive inertial confinement fusion
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DOI：
10.1063/5.0096427
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发表时间：
2022-09
影响因子：
2.2
通讯作者：
Z. Li;X. Yang;H. Xu;G. B. Zhang;B. Zeng;S. Chen;Y. Ma;F. Wu;J. Zhang
中科院分区：
文献类型：
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作者：
Z. Li;X. Yang;H. Xu;G. B. Zhang;B. Zeng;S. Chen;Y. Ma;F. Wu;J. Zhang
惯性约束聚变（ICF）需要准等熵压缩来将靶压缩到高密度和高温状态，其中激光脉冲形状与靶结构的匹配对内爆具有重要意义。然而，为了实现这种匹配，需要对激光脉冲形状和靶结构的许多参数进行优化。采用随机优化方法设计了358.40 kJ激光脉冲驱动的直接驱动ICF内爆的驱动激光脉冲和靶结构。该方法可以快速优化激光脉冲和靶结构参数，使等离子体得到有效的准等熵压缩，从而使等离子体的面密度比流体动力学标度高9.30%。构造了相关矩阵，分析了参数之间的相关性.为进一步优化和改进提供了参考。该方法在未来ICF实验靶设计中具有潜在的应用价值。
Quasi-isentropic compression is required for inertial confinement fusion (ICF) to compress the target to a high density and high temperature status, where to match the laser pulse shape and target structure is of great significance to the implosion. However, many parameters for the laser pulse shape and the target structure should be optimized in order to realize such match. In this paper, the drive laser pulse and the target structure are designed using a random optimization method for a direct-drive ICF implosion driven by a 358.40 kJ laser pulse. This method can quickly optimize the laser pulse and target structure parameters for an efficient quasi-isentropic compression of the plasmas, leading to an areal density of 9.30% higher than that given by the hydrodynamic scaling. A correlation matrix is also constructed to analyze the correlation between the parameters. This provides a reference for further optimization and improvement. The method should have potential applications in the target design for future ICF experiments.