An improved view-factor method including plasma filling for angular distribution of radiation temperature from a laser-driven hohlraum
An improved view-factor method including plasma filling for angular distribution of radiation temperature from a laser-driven hohlraum
复制标题
一种改进的视角系数方法，包括用于激光驱动黑腔辐射温度角分布的等离子体填充
DOI：
10.1088/2058-6272/ab9a25
复制
发表时间：
2020
影响因子：
1.7
通讯作者：
Huang Yunbao
中科院分区：
文献类型：
--
作者：
Jing Longfei;Jiang Shaoen;Kuang Longyu;Zhang Lu;Zheng Jianhua;Li Liling;Lin Zhiwei;Li Hang;Huang Tianxuan;Huang Yunbao
激光驱动黑腔辐射温度的角分布对于间接驱动惯性约束聚变中黑腔辐射场的研究、程序验证和对密封舱驱动的预测具有重要意义。提出了一种包含等离子体填充的视角因子法的改进形式，提高了辐射温度角分布的描述精度。首先，从一个简单的基于数据的模型，在一个充气黑腔实验中进行了在中国的数百千焦耳的激光装置上的金泡运动的径向速度标度。在此基础上，提出了一种等效辐射体积模型，用于近似描述IRAD 3D中新视角因子法中吹脱气泡的贡献。数值模拟结果与实验测量结果吻合较好。分析了电子密度分布、温度分布和气泡速度对气泡运动的影响。该方法的价值是，它可以被用来作为一个近似的“第一次看”在黑腔能量平衡之前，更详细的辐射流体动力学建模。
Angular distribution of radiation temperature from a laser-driven hohlraum is vital for investigations on the radiation field inside the hohlraum, code validation, and predication of drive on the capsule in indirect-drive inertial confinement fusion. A modified version of the view-factor method including plasma filling is proposed, which improves the accuracy of the description of angular distribution of radiation temperature. Firstly, the radial velocity of the gold bubble motion is scaled from a simple data-based model in a gas-filled hohlraum experiment performed on a hundreds of kJ laser facility in China. Then, an equivalent radiative volume model is advanced to approximately characterize the contribution of the blow-off bubble in the new view-factor method incorporate into IRAD3D. The simulation shows reasonable agreement with experimental measurements in a gas-filled hollow hohlraum. Furthermore, the influence of the electron density and temperature distribution, and bubble velocity, is analyzed. The value of the method is that it can be used as an approximate 'first-look' at hohlraum energy balance prior to a more detailed radiation hydrodynamic modeling.