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神光-Ⅱ和神光-Ⅲ原型内爆对称性实验的模型分析串
Model analysis of experiments of implosion symmetry on Shenguang- Ⅱ and Shenguang-Ⅲ prototype laser facilities＊
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摘要: 内爆靶丸的X光辐射驱动对称性分析和控制能力演示是惯性约束聚变（ICF）研究最重要的课题之一，目前国内外已展开许多实验和模拟研究．建立了一种ICF内爆对称性分析的简化模型，利用该模型分析了神光-Ⅱ和神光-Ⅲ原型激光装置上的内爆对称性实验．与实验结果比较表明，计算最佳腔长与实验值基本相符；靶丸压缩变形因子计算结果也与实验测量值接近．模型的有效性得到验证，可为即将开展的神光-Ⅲ主机内爆对称性实验参数设计和结果分析提供参考．Abstract: The analysis and control of implosion symmetry of fuel capsule is one of the most important issues in inertial confinement fusion （ICF）, and many experiments and simulations on it have been done. Here we use a simple model on implosion symmetry in ICF to analyze the best lengths of the hohlraum and distortions of capsule on Shenguang- Ⅱ and Shenguang-Ⅲ prototype laser facility. It is shown that the calculated best lengths agree with the ones obtained in experiment and the calculated capsule distortions are also close to experimental measurements. The validated model may give some references to the future experiments of implosion symmetry on Shenguang-Ⅲ laser facility.
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