Time-dependent density-functional-theory calculations of the nonlocal electron stopping range for inertial confinement fusion applications

被引：8

作者：

Nichols, K. A. ^{[1
,2
]}

Hu, S. X. ^{[1
,2
,3
]}

White, A. J. ^{[4
]}

Goncharov, V. N. ^{[1
,3
]}

Mihaylov, D. I. ^{[1
]}

Collins, L. A. ^{[4
]}

Shaffer, N. R. ^{[1
]}

Karasiev, V. V. ^{[1
]}

机构：

[1] Univ Rochester, Lab Laser Energet, Rochester, NY 14623 USA

[2] Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA

[3] Univ Rochester, Dept Mech Engn, Rochester, NY 14623 USA

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW E | 2023年 / 108卷 / 03期

关键词：

MOLECULAR-DYNAMICS; MODEL; PSEUDOPOTENTIALS; TRANSPORT;

D O I：

10.1103/PhysRevE.108.035206

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Nonlocal electron transport is important for understanding laser-target coupling for laser-direct-drive (LDD) inertial confinement fusion (ICF) simulations. Current models for the nonlocal electron mean free path in radiation-hydrodynamic codes are based on plasma-physics models developed decades ago; improvements are needed to accurately predict the electron conduction in LDD simulations of ICF target implosions. We utilized time-dependent density functional theory (TD-DFT) to calculate the electron stopping power (SP) in the so-called conduction-zone plasmas of polystyrene in a wide range of densities and temperatures relevant to LDD. Compared with the modified Lee-More model, the TD-DFT calculations indicated a lower SP and a higher stopping range for nonlocal electrons. We fit these electron SP calculations to obtain a global analytical model for the electron stopping range as a function of plasma conditions and the nonlocal electron kinetic energy. This model was implemented in the one-dimensional radiation-hydrodynamic code LILAC to perform simulations of LDD ICF implosions, which are further compared with simulations by the standard modified Lee-More model. Results from these integrated simulations are discussed in terms of the implications of this TD-DFT-based mean-free-path model to ICF simulations.

引用

页数：10

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