Temperature relaxation in strongly-coupled binary ionic mixtures

Sprenkle, Robert; Silvestri, Luciano; Murillo, Michael S.; Bergeson, Scott

doi:10.1038/s41467-021-27696-5

Cited by 16 publications

(10 citation statements)

References 65 publications

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“…2016; Sprenkle et al. 2022), we are not aware of any other rigorous demonstration, starting from the BBGKY hierarchy, that this approximation is valid for a two-temperature plasma. This result, which is consistent with the physical picture developed in § 3.1, will allow us to calculate the temperature changes during correlation heating in a very simple way.…”

Section: Response Of Plasma To Sudden Electron Heatingmentioning

confidence: 90%

“…Indeed, in strongly coupled plasmas, it has been observed in simulations (Morozov & Norman 2003; Pohl, Pattard & Rost 2004; Niffenegger, Gilmore & Robicheaux 2011; Sprenkle et al. 2022) and experiments (Chen et al. 2004; Laha et al.…”

Section: Time Evolution Of the Ion Kinetic Energymentioning

confidence: 94%

“…2016; Sprenkle et al. 2022). When such a plasma is not at steady state, the electron temperature does not necessarily remain constant, so the screening length is a dynamical variable which should be evolved along with the ion distribution function.…”

Section: Temperature Changes Due To Correlation Heatingmentioning

confidence: 99%

“…While it is common to model the ions as a YOCP in theoretical and computational work (e.g. Hamaguchi, Farouki & Dubin 1997;Murillo 2001;Murillo 2009;Lyon, Bergeson & Murillo 2013;Langin et al 2016;Sprenkle et al 2022), we are not aware of any other rigorous demonstration, starting from the BBGKY hierarchy, that this approximation is valid for a two-temperature plasma. This result, which is consistent with the physical picture developed in § 3.1, will allow us to calculate the temperature changes during correlation heating in a very simple way.…”

Section: Ion Evolutionmentioning

confidence: 99%

“…As previously discussed, the ions in a two-temperature plasma are often approximated using a YOCP model (e.g. Hamaguchi et al 1997;Murillo 2001;Murillo 2009;Langin et al 2016;Sprenkle et al 2022). When such a plasma is not at steady state, the electron temperature does not necessarily remain constant, so the screening length is a dynamical variable which should be evolved along with the ion distribution function.…”

Section: Electron Temperature T E1mentioning

confidence: 99%

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Fast correlation heating in moderately coupled electron–ion plasmas

Foster,

Fetsch,

Fisch

2023

J. Plasma Phys.

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If the electrons in a plasma are suddenly heated, the resulting change in Debye shielding causes the ion kinetic energy to quickly increase. For the first time, this correlation heating, which is much faster than collisional energy exchange, is rigorously derived for a moderately coupled, electron–ion plasma. The electron–ion mass ratio is taken to be the smallest parameter in the Bogoliubov–Born–Green–Kirkwood–Yvon hierarchy, smaller even than the reciprocal of the plasma parameter. This ordering differs from conventional kinetic theory by making the electron collision rates faster than the ion plasma frequency, which allows stronger coupling and makes the ion heating a function only of the total energy supplied to the electrons. The calculation uses known formulae for correlations in a two-temperature plasma, for which a new, elementary derivation is presented. Suprathermal ions may be created more rapidly by this mechanism than by ion–electron Coulomb collisions. This means that the use of a femtosecond laser pulse could potentially help to achieve ignition in certain fast ignition approaches to inertial confinement fusion.

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Section: Response Of Plasma To Sudden Electron Heatingmentioning

confidence: 90%

Section: Time Evolution Of the Ion Kinetic Energymentioning

confidence: 94%

Section: Temperature Changes Due To Correlation Heatingmentioning

confidence: 99%

Section: Ion Evolutionmentioning

confidence: 99%

Section: Electron Temperature T E1mentioning

confidence: 99%

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Fast correlation heating in moderately coupled electron–ion plasmas

Foster,

Fetsch,

Fisch

2023

J. Plasma Phys.

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Electron–ion temperature relaxation in nonideal plasmas: High accuracy classical molecular dynamics simulations

Lavrinenko,

Morozov,

Valuev

2024

Contributions to Plasma Physics

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In this work, we prepare a simulation framework for a high‐accuracy numerical study of electron–ion temperature relaxation in nonideal (strongly coupled) plasmas. The existing relaxation rate theories require either parameter selection or some pre‐knowledge of the electron–ion correlation functions and effective interaction potentials. This makes non‐equilibrium classical and quantum molecular dynamics simulations a crucial stage in the study of energy transfer rates. We begin by revisiting the classical molecular dynamics simulations of a system of equally charged particles with different masses on a neutralizing background. We accurately simulate this simple ab‐initio (parameterless) system with controlled precision in terms of number of particles, mass ratio, and energy convergence. The predictions for the equally charged system are compared to the previous simulations and theories, which are reproduced with higher accuracy. We also perform a series of classical molecular dynamics simulations of the system of oppositely charged particles with the corrected Kelbg potential based on the quantum statistical approach. We analyze the differences and similarities between the same‐charge and opposite‐charge systems. Some remarks about the forthcoming application of quantum simulations with the help of WPMD or WPMD‐DFT methods are given.

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