| 通过理论定标律研究激光间接驱动的参数空间 |
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| 引用本文： | 杨宸,范征锋,刘杰,张存波,于承新,任国利.通过理论定标律研究激光间接驱动的参数空间[J].强激光与粒子束,2019,31(6):062001-1-062001-11. |
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| 作者姓名： | 杨宸 范征锋 刘杰 张存波 于承新 任国利 |
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| 作者单位： | 1.北京应用物理与计算数学研究所，北京 100088 |
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| 基金项目： | 国家自然科学基金项目11475032国家自然科学基金项目11775030国家自然科学基金项目11871114中国工程物理研究院院长基金项目201402037 |
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| 摘 要： | 系统地梳理了激光间接驱动点火靶内爆压缩的物理过程，使用理论方法和一维流体力学模拟给出了靶丸内爆过程中的关键定标律公式。通过这些定标律公式获得了在给定黑腔辐射温度、飞行熵增因子、整形速度和烧蚀材料的条件下，靶丸装量——半径参数空间的点火岛区域。研究了靶丸性能参数随辐射温度、飞行熵增因子等的变化规律:当靶丸所处黑腔辐射温度升高时，内爆的稳定性将变好；设计上在靶丸装量不变的条件下，靶丸半径需要减小。当靶丸的飞行熵增因子增大时，内爆增益略微减小，内爆稳定性变好；但是点火阈值因子减小导致点火岛的区域变窄。当靶丸的整形速度增大时，点火岛的区域略微变大，内爆稳定性变化不显著；设计上在靶丸装量不变的条件下，需要增大靶丸半径，这会导致靶丸壳层形状因子变大。当改变靶丸烧蚀材料，提高质量烧蚀速率与烧蚀压时，能量增益变大且稳定性增强；设计上在靶丸装量不变的条件下，需要减小靶丸半径。
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| 关 键 词： | 激光聚变 间接驱动 内爆动力学 靶丸设计 定标律 |
| 收稿时间： | 2018-11-26 |
Parameter spaces of laser indirect-driven target by theoretic scaling laws |
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| Affiliation: | 1.Institute of Applied Physics and Computational Mathematics, Beijing 100088, China2.Graduate School of China Academy of Engineering Physics, Beijing 100088, China3.Center for Applied Physics and Technology, Peking University, Beijing 100871, China |
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| Abstract: | This paper studies settles systematically the physical process of the laser indirect-driven ignition target implosion. The theoretical methods and one-dimensional hydro-dynamics simulations are used to give key scaling laws in capsule implosion. Based on these scaling laws, the volcanic islands of capsule mass-radius parameter space are obtained under the given conditions of hohlraum radiation temperature, in-flight adiabat, shaping velocity and ablator material. The variations in performance parameters with radiation temperature, in-flight adiabat, etc. are investigated. When the hohlraum radiation temperature increaseds, the stability of the capsule implosion will be better. And the capsule radius needs to be decreased under the condition that the mass is constant. When the in-flight adiabat increases, the energy gain decreases slightly and the stability becomes better. However the reduction in the one-dimensional ignition threshold factor results in a narrowing of the area of the volcanic island. When the shaping speed increases, the area of the volcanic island becomes slightly larger, and the stability change is not significant. The capsule radius needs to be increased under the condition that the capsule mass is constant, which causes larger aspect ratio. When the shell ablator material is changed to improve the mass ablation rate and the ablation pressure, the energy gain is larger and the stability is better. The capsule radius needs to be decreased under the condition that the capsule mass is constant. |
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