A multi-dimensional Vlasov-Fokker-Planck code for arbitrarily anisotropic high-energy-density plasmas

Tzoufras, M.; Tableman, Adam; Tsung, F. S.; Mori, W. B.; Bell, A. R.

doi:10.1063/1.4801750

Cited by 20 publications

(17 citation statements)

References 32 publications

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“…First derived by Bobylev and Chuyanov [41], and cast into a non-relativistic collision operator by Tzoufras et al [42] [43], this formulation is given in integro-differential operator form as:…”

Section: Elastic Electron Collisionsmentioning

confidence: 99%

Non-thermal evolution of dense plasmas driven by intense x-ray fields

Ren¹,

Shi²,

Berg³

et al. 2022

Preprint

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The advent of x-ray free-electron lasers (XFELs) has enabled a range of new experimental investigations into the properties of matter driven to extreme conditions via intense x-ray-matter interactions. The femtosecond timescales of these interactions lead to the creation of transient high-energy-density plasmas, where both the electrons and the ions may be far from local thermodynamic equilibrium (LTE). Predictive modelling of such systems remains challenging because of the substantially different timescales on which electrons and ions thermalize, and because of the vast number of atomic configurations that are required to describe the resulting highly-ionized plasmas.Here we explore the evolution of systems driven to high energy densities using CCFLY, a non-LTE, Fokker-Planck collisional-radiative code. We use CCFLY to investigate the evolution dynamics of a solid-density plasma driven by an XFEL, and explore the relaxation of the plasma to local thermodynamic equilibrium on femtosecond timescales in terms of the charge state distribution, electron density, and temperature.

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Section: Elastic Electron Collisionsmentioning

confidence: 99%

Non-thermal evolution of dense plasmas driven by intense x-ray fields

Ren¹,

Shi²,

Berg³

et al. 2022

Preprint

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“…Results obtained with the reduced model described in section II B and implemented in our code JASMINE are compared to the numerical simulations performed with ALADIN and the full kinetic code OSHUN [37,38]. The considered case is representative of the conditions appearing in the conduction region during a laser-driven implosion process.…”

Section: Nonlocal Regimementioning

confidence: 99%

Analysis of a kinetic model for electron heat transport in inertial confinement fusion plasmas

Chrisment,

Loiseau,

Feugeas

et al. 2022

Preprint

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“…Due to complexity and high computational cost, most electron kinetic models (with two exceptions to be mentioned later) neglect Q and further assume that the plasma ionization state Z is fixed in time [10][11][12][13][14]. Strictly speaking, this assumption is only valid for a fully ionized plasma where there are not any inelastic processes occurring.…”

Section: Computational Modelmentioning

confidence: 99%

Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport

Sherlock

Scott

2019

Phys. Rev. E

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This paper describes a computational model that self-consistently combines physics of kinetic electrons and atomic processes in a single framework. The formulation consists of a kinetic Vlasov-Boltzmann-Fokker-Planck equation for free electrons and a non-Maxwellian collisional-radiative model for atomic state populations. We utilize this model to examine the influence of atomic kinetics on inverse bremsstrahlung (IB) heating and nonlocal thermal transport. We show that atomic kinetics affects non-linear IB absorption rates by further modifying the electron distribution in addition to laser heating. We also show that accurate modeling of nonlocal heat flow requires a self-consistent treatment of atomic kinetics, because the effective thermal conductivity strongly depends on the ionization balance of the plasma.

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A multi-dimensional Vlasov-Fokker-Planck code for arbitrarily anisotropic high-energy-density plasmas

Cited by 20 publications

References 32 publications

Non-thermal evolution of dense plasmas driven by intense x-ray fields

Non-thermal evolution of dense plasmas driven by intense x-ray fields

Analysis of a kinetic model for electron heat transport in inertial confinement fusion plasmas

Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport

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