Self-consistent and precise measurement of time-dependent radiative albedo of gold based on specially symmetrical triple-cavity Hohlraum  

作　　者：Zhiyu Zhang Yang Zhao Xiaoying Han Liling Li Bo Qing Lifei Hou Yulong Li YuXue Zhang Huan Zhang Xiangming Liu Bo Deng Gang Xiong Min Lv Tuo Zhu Chengwu Huang Tianming Song Yan Zhao Yingjie Li Lu Zhang Xufei Xie Jiyan Zhang Jiamin Yang 

机构地区：[1]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China [2]National Key Laboratory of Plasma Physcis,Mianyang 621900,China [3]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China

出　　处：《Matter and Radiation at Extremes》2024年第3期57-64,共8页极端条件下的物质与辐射（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.12004351).

摘　　要：A self-consistent and precise method to determine the time-dependent radiative albedo,i.e.,the ratio of the reemission flux to the incident flux,for an indirect-drive inertial confinement fusion Hohlraum wall material is proposed.A specially designed symmetrical triple-cavity gold Hohlraum is used to create approximately constant and near-equilibrium uniform radiation with a peak temperature of 160 eV.The incident flux at the secondary cavity waist is obtained from flux balance analysis and from the shock velocity of a standard sample.The results agree well owing to the symmetrical radiation in the secondary cavity.A self-consistent and precise time-dependent radiative albedo is deduced from the reliable reemission flux and the incident flux,and the result from the shock velocity is found to have a smaller uncertainty than that from the multi-angle flux balance analysis,and also to agree well with the result of a simulation using the HYADES opacity.

关 键 词：PRECISE cavity RADIATIVE 

分 类 号：TL7[核科学技术—辐射防护及环境保护]