Progress on wide-range equation of state for hydrogen and deuterium

Q4 Engineering
Liu Haifeng, Li. Qiong, Zhang Qi-li, Zhang Gongmu, Song Hong-zhou, Zhao Yan-Hong, Sun Bo, Song Hai-feng
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引用次数: 0

Abstract

Hydrogen is the most abundant element in nature and an important object of astrophysics and ICF research. This paper briefly presents an overview of the research progress in wide-range equation of state and especially comments assessment of the most recent shock compression experiments on Omega laser facility and the theoretical models. Based on the previous work, the wide-range equation of state of hydrogen is constructed by using the improved chemical free energy model, the first-principle numerical simulation results and the multi-parameter equation of state model, which is applicable in the temperature range of 20−108 K and the density range of 10−7−2000 g/cm3. Compared with experimental results, such as those of shock compression experiment, static high pressure isotherm experiment and sound velocity experiment, the newly-constructed wide-range equation of state for hydrogen has high confidence and provides high precision data for astrophysics, inertial confinement fusion, international thermonuclear experimental reactor and other engineering physics designs. The construction and validation method of the hydrogen wide-range equation of state can also be applied to its isotope deuterium. In comparison with current models published abroad, the deuterium wide-range equation of state constructed by this method is in better agreement with the experimental data of principal and secondary Hugoniot published in 2019. This paper also points out the temperature-density regimesthat need attention in future research.
氢氘宽范围状态方程研究进展
氢是自然界中含量最丰富的元素,也是天体物理学和ICF研究的重要对象。本文简要介绍了宽范围状态方程的研究进展,特别是对最近在欧米茄激光装置上进行的冲击压缩实验和理论模型的评价。在前人工作的基础上,利用改进的化学自由能模型、第一性原理数值模拟结果和多参数状态方程模型,构建了适用于20−108 K温度范围和10−7−2000 g/cm3密度范围的氢的宽范围状态方程。与冲击压缩实验、静态高压等温线实验和声速实验等实验结果相比,新构建的氢宽范围状态方程具有较高的置信度,为天体物理学、惯性约束聚变、,国际热核实验堆等工程物理设计。氢宽范围状态方程的构建和验证方法也可以应用于其同位素氘。与国外现有的模型相比,该方法构建的氘宽程状态方程与2019年发表的主、次Hugoniot实验数据吻合较好。本文还指出了未来研究中需要注意的温度密度区域。
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来源期刊
强激光与粒子束
强激光与粒子束 Engineering-Electrical and Electronic Engineering
CiteScore
0.90
自引率
0.00%
发文量
11289
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