Electrical and thermal conductivities in dense plasmas

Faussurier, G.; Blancard, C.; Combis, P.; Videau, L.

doi:10.1063/1.4895509

Cited by 26 publications

(16 citation statements)

References 58 publications

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“…Taking in mind (46) and (36), one can suppose that in the case of dynamical screening (40) the screening function f scr will also be restricted from below by the value…”

Section: Effective Screening Parametermentioning

confidence: 99%

Optical conductivity of warm dense matter within a wide frequency range using quantum statistical and kinetic approaches

et al. 2016

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Fundamental properties of warm dense matter are described by the dielectric function, which gives access to the frequency-dependent electrical conductivity, absorption, emission and scattering of radiation, charged particles stopping and further macroscopic properties. Different approaches to the dielectric function and the related dynamical collision frequency are compared in a wide frequency range. The high-frequency limit describing inverse bremsstrahlung and the low-frequency limit of the dc conductivity are considered. Sum rules and Kramers-Kronig relation are checked for the generalized linear response theory and the standard approach following kinetic theory. The results are discussed in application to aluminum, xenon and argon plasmas.

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“…Taking in mind (46) and (36), one can suppose that in the case of dynamical screening (40) the screening function f scr will also be restricted from below by the value…”

Section: Effective Screening Parametermentioning

confidence: 99%

Optical conductivity of warm dense matter within a wide frequency range using quantum statistical and kinetic approaches

et al. 2016

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“…It is also possible to use the KG method with the average atom model, [17][18][19][20][21][22] but we have opted not to use this approach as it remains to be proven that this contains the correct limiting behaviour at high temperature, and is…”

Section: Introductionmentioning

confidence: 99%

“…We focus on aluminium as it is a widely used conductor, but the approach can be applied to other materials. We employ two methods: the accurate but expensive DFT molecular dynamics (DFT-MD), coupled with the Kubo-Greenwood (KG) approximation, [14] which is practical for degenerate systems, and the more approximate potential of mean force approach, [15,16] which is accurate for moderate to weakly degenerate plasma and is relatively inexpensive.It is also possible to use the KG method with the average atom model, [17][18][19][20][21][22] but we have opted not to use this approach as it remains to be proven that this contains the correct limiting behaviour at high temperature, and is…”

mentioning

confidence: 99%

Tabular electrical conductivity for aluminium

Starrett

Perriot

Shaffer

et al. 2019

Contributions to Plasma Physics

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A new Sesame‐type table for the electrical conductivity of aluminium is described. The table is based on density functional theory calculations and ranges from 10−3 to 1 times solid density (2.7 g/cm3), and from 10−2 to 103 eV in temperature. The table is compared with other those of simulations and to experiments and is generally in good agreement. The high‐temperature, classical limit of the conductivity is recovered for the highest temperatures and lowest densities. The table is critically evaluated, and directions for improvements are discussed.

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“…64,66,67 Significant differences (by a factor of 3-10) in the WDM regime have been revealed between these models and the FP calculations of the thermal conductivity. In turn, these FP results have been used to improve the physics models 68 implemented in ICF hydrocodes. In addition, the electron-ion thermal equilibration has also been re-examined for ICF-relevant plasma conditions in recent years.…”

Section: Introductionmentioning

confidence: 99%

Impact of first-principles properties of deuterium–tritium on inertial confinement fusion target designs

Goncharov

Boehly

et al. 2015

Physics of Plasmas

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A comprehensive knowledge of the properties of high-energy-density plasmas is crucial to understanding and designing low-adiabat, inertial confinement fusion (ICF) implosions through hydrodynamic simulations. Warm-dense-matter (WDM) conditions are routinely accessed by low-adiabat ICF implosions, in which strong coupling and electron degeneracy often play an important role in determining the properties of warm dense plasmas. The WDM properties of deuterium–tritium (DT) mixtures and ablator materials, such as the equation of state, thermal conductivity, opacity, and stopping power, were usually estimated by models in hydro-codes used for ICF simulations. In these models, many-body and quantum effects were only approximately taken into account in the WMD regime. Moreover, the self-consistency among these models was often missing. To examine the accuracy of these models, we have systematically calculated the static, transport, and optical properties of warm dense DT plasmas, using first-principles (FP) methods over a wide range of densities and temperatures that cover the ICF “path” to ignition. These FP methods include the path-integral Monte Carlo (PIMC) and quantum-molecular dynamics (QMD) simulations, which treat electrons with many-body quantum theory. The first-principles equation-of-state table, thermal conductivities (κQMD), and first principles opacity table of DT have been self-consistently derived from the combined PIMC and QMD calculations. They have been compared with the typical models, and their effects to ICF simulations have been separately examined in previous publications. In this paper, we focus on their combined effects to ICF implosions through hydro-simulations using these FP-based properties of DT in comparison with the usual model simulations. We found that the predictions of ICF neutron yield could change by up to a factor of ∼2.5; the lower the adiabat of DT capsules, the more variations in hydro-simulations. The FP-based properties of DT are essential for designing ICF ignition targets. Future work on first-principles studies of ICF ablator materials is also discussed.

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Electrical and thermal conductivities in dense plasmas

Cited by 26 publications

References 58 publications

Optical conductivity of warm dense matter within a wide frequency range using quantum statistical and kinetic approaches

Optical conductivity of warm dense matter within a wide frequency range using quantum statistical and kinetic approaches

Tabular electrical conductivity for aluminium

Impact of first-principles properties of deuterium–tritium on inertial confinement fusion target designs

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