Nagayama T, Mancini R C, Florido R, Tommasini R, Koch J A, Delettrez J A, Regan S P, Smalyuk V A, Welser-Sherrill L A, Golovkin I E
Department of Physics, University of Nevada, Reno, Nevada 89557, USA.
Rev Sci Instrum. 2008 Oct;79(10):10E921. doi: 10.1063/1.2966370.
Detailed analysis of x-ray narrow-band images from argon-doped deuterium-filled inertial confinement fusion implosion experiments yields information about the temperature spatial structure in the core at the collapse of the implosion. We discuss the analysis of direct-drive implosion experiments at OMEGA, in which multiple narrow-band images were recorded with a multimonochromatic x-ray imaging instrument. The temperature spatial structure is investigated by using the sensitivity of the Ly beta/He beta line emissivity ratio to the temperature. Three analysis methods that consider the argon He beta and Ly beta image data are discussed and the results compared. The methods are based on a ratio of image intensities, ratio of Abel-inverted emissivities, and a search and reconstruction technique driven by a Pareto genetic algorithm.
对来自掺氩充氘惯性约束聚变内爆实验的X射线窄带图像进行详细分析，可得出内爆坍缩时核心温度空间结构的信息。我们讨论了在OMEGA上进行的直接驱动内爆实验的分析，其中使用多单色X射线成像仪器记录了多个窄带图像。利用Lyβ/Heβ线发射率比与温度的敏感性来研究温度空间结构。讨论了三种考虑氩Heβ和Lyβ图像数据的分析方法，并比较了结果。这些方法基于图像强度比、阿贝尔反演发射率比以及由帕累托遗传算法驱动的搜索和重建技术。
