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

IF 4.8 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Matter and Radiation at Extremes Pub Date : 2024-02-29 DOI:10.1063/5.0177038

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

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Abstract

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.

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基于特别对称的三腔光室，自洽而精确地测量随时间变化的金辐射反照率

提出了一种自洽和精确的方法来确定间接驱动惯性约束聚变光室壁材料的随时间变化的辐射反照率，即再发射通量与入射通量之比。使用专门设计的对称三腔金质光室来产生近似恒定和接近平衡的均匀辐射，其峰值温度为 160 eV。二级腔腰的入射通量是通过通量平衡分析和标准样品的冲击速度获得的。由于次级空腔中的辐射是对称的，因此结果非常吻合。从可靠的再发射通量和入射通量中推导出了自洽和精确的随时间变化的辐射反照率，并发现冲击速度的结果比多角度通量平衡分析的结果具有更小的不确定性，而且与使用 HYADES 不透明度模拟的结果非常吻合。

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来源期刊

Matter and Radiation at Extremes Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

8.60

自引率

9.80%

发文量

160

审稿时长

15 weeks

期刊介绍： Matter and Radiation at Extremes (MRE), is committed to the publication of original and impactful research and review papers that address extreme states of matter and radiation, and the associated science and technology that are employed to produce and diagnose these conditions in the laboratory. Drivers, targets and diagnostics are included along with related numerical simulation and computational methods. It aims to provide a peer-reviewed platform for the international physics community and promote worldwide dissemination of the latest and impactful research in related fields.