Equation of state of shock compressed gases at megabar pressure range

Gryaznov, V. K.; Iosilevskiy, Igor; Фортов, В. Е.

doi:10.1063/1.3686427

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…The most part of this area lies in range of plasma parameters, where the formation of bound electron-ion pairs is strongly suppressed. Since these non-Gaussian double peak forms of distribution function could be considered as implicit evidence of existence of two-phase region, the arrangement of area IV could be regarded as conformation of assumption stated in [11,12] of main role of electron-ion pairs in supply of plasma thermodynamic stability.…”

Section: 0mentioning

confidence: 99%

“…The question of the PPT existence is still open [3][4][5][6][7][8], although there are some experimental data, which can be considered as indirect confirmation of this phenomenon [5,7,9,10]. Gryaznov and Iosilevskiy [11,12] noted that there might be an additional repulsive force which should be taken into account. They worked in the frames of the chemical model.…”

Section: Introductionmentioning

confidence: 97%

“…Since the border value s max depends on the electron number density n e , the additional corrections to pressure appear which contain derivatives ∂Z(s max (n))/∂s max [11,12]. These corrections have physical meaning and lead to additional repulsion.…”

Section: Introductionmentioning

confidence: 99%

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Pressure Fluctuations in Nonideal Plasma

Lankin

Norman

Saitov

2010

Contrib. Plasma Phys.

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Fluctuations of pressure of singly ionized nonideal plasma are studied using the fluctuation approach which provides the self-consistent joint description of free and weakly bound electron states. The classical molecular dynamics method is used. The electron-ion interaction is described by the density-and temperature-independent cutoff Coulomb potential. The results for partially ionized plasma are related to the Gryaznov-Iosilevsky effective repulsion which could suppress the thermodynamic plasma instability. The fully ionized plasma region is found where pressure fluctuation distribution can be approximated by the superposition of two Gauss distribution functions. It could be considered as a precursor of the plasma phase transition.

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Section: 0mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Pressure Fluctuations in Nonideal Plasma

Lankin

Norman

Saitov

2010

Contrib. Plasma Phys.

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“…The DHH approximation was proposed for a one‐component plasma model by Gryaznov and Iosilevskiy, and afterwards independently re‐derived by Nordholm. This approximation was used later by Khrapak et al for a two‐component electroneutral model of macroions and microions.…”

Section: Debye–hückel Plus Hole Approximation In Complex Plasmamentioning

confidence: 99%

Effect of the non‐linear screening on a modification of the Debye–Hückel plus hole approximation in complex plasma

Martynova

Iosilevskiy

2019

Contributions to Plasma Physics

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The authors analyse two‐component electroneutral systems of classical macroions of finite size and point‐like oppositely charged microions. This article deals with the modification of the Debye–Hückel plus hole approximation when a non‐linear screening effect is taken into account in a complex plasma. Parameters of non‐linear screening of the macroions by surrounding microions are calculated within the framework of the Poisson–Boltzmann approximation. Two effects are found as a result of such calculations: (a) subdivision of all microions into two subclasses, free microions and bound microions and (b) a significant reduction of an effective charge Z* of the macroion in comparison with its true value Z due to the non‐linear screening by a thin high‐density envelope of the bound microions. We show that the value of a non‐ideal portion of an internal energy differs considerably in the case when the non‐linear screening effect is taken into account in the vicinity of the macroion.

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“…Ab initio simulation techniques for warm dense matter such as Path Integral Monte Carlo (PIMC) [6,7] or the finite temperature density functional theory molecular dynamics (FT-DFT-MD) simulations [8,9] which systematically treat quantum effects and correlations have recently taken a great success. The models based on the chemical picture [10] have been applied for description of thermodynamics of plasma of low and moderate densities for a long time [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Properties of Hydrogen Plasma to Megabars

Gryaznov

Iosilevskiy

2016

Contrib. Plasma Phys.

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The approach based on the chemical picture of plasma taking into account effects of Coulomb interaction, short range repulsion of atoms and molecules, free electron degeneracy for description of equilibrium composition and thermodynamic functions of non-ideal plasma is proposed. The results of calculations of thermodynamic parameters using the models based upon this approach are presented. The parameters of thermal and caloric equation of state for hydrogen plasma were calculated from moderate to high densities in wide range of temperatures.

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Equation of state of shock compressed gases at megabar pressure range

Cited by 5 publications

References 18 publications

Pressure Fluctuations in Nonideal Plasma

Pressure Fluctuations in Nonideal Plasma

Effect of the non‐linear screening on a modification of the Debye–Hückel plus hole approximation in complex plasma

Thermodynamic Properties of Hydrogen Plasma to Megabars

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