Fluid-phase helium: Shock-compression experiments, quantum molecular dynamics simulations, and development of an equation of state

被引：3

作者：

Myint, Philip C. ^{[1
]}

Root, Seth ^{[2
]}

Wu, Christine J. ^{[1
]}

Clay, Raymond C. ^{[2
]}

Lopez, Andrew ^{[2
]}

Hanshaw, Heath L. ^{[2
]}

Lemke, Raymond W. ^{[2
]}

Bliss, David E. ^{[2
]}

Hanson, David L. ^{[2
]}

Flicker, Dawn G. ^{[2
]}

Long, Zoe C. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 13期

关键词：

QUASI-ISENTROPIC COMPRESSIBILITY; DENSITY; PURGATORIO; PLUTONIUM; DEUTERIUM; PRESSURE; HUGONIOT; MODEL; INDEX; HOT;

D O I：

10.1103/PhysRevB.108.134202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Helium (He) plays a critical role in numerous areas ranging from the study of celestial objects like brown dwarfs and gas giants to modern-day technologies like nuclear energy and rocket propulsion. For many of these applications, it is essential to have a reliable equation of state (EOS) for He that yields an accurate representation of its thermodynamic behavior. To help constrain and develop such EOS models, we have performed a series of shock-compression experiments on cryogenic liquid He to pressures exceeding 100 GPa using a magnetically accelerated flyer plate on Sandia National Laboratories' Z-machine. We have also performed quantum molecular dynamics simulations that are consistent with our shock measurements. None of the previously available EOSs agree with our experimental and simulation results, motivating the development of a fluid-phase He EOS that we present in this study. We show that our EOS yields good agreement with published data that span temperatures and pressures encountered across a diverse array of applications.

引用

页数：16

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