Equations of state, transport properties, and compositions of argon plasma: Combination of self-consistent fluid variation theory and linear response theory

Quan, Weilong; Chen, Q. F.; Fu, Zhen‐Guo; Sun, Xiaowei; Zheng, Jun; Gu, Yu

doi:10.1103/physreve.91.023106

Cited by 7 publications

(4 citation statements)

References 59 publications

(93 reference statements)

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“…To further exclude this possibility, a series of FTDFT+MD calculations are carried out surrounding the experimental density and temperature. Based on previous theoretical estimations 4 11 22 , which predicted that Mott effect took place at a length scale comparable to the diameter of the outer-most electronic orbitals, we consider the density between 1 g/cm 3 and 8.34 g/cm 3 . The upper limit of 8.34 g/cm 3 corresponds to an average atomic distance ~2 Å, slightly larger than the diameter d = 1.94 Å of the 3 p orbital for an isolated Ar atom.…”

Section: Resultsmentioning

confidence: 99%

“…The temperature concerned is between 10 3 K and 2 × 10 4 K. Higher temperature is not considered because both theories and experiments showed that Mott effect prefers lower temperature. It can only take place below some critical temperature 4 11 12 13 21 22 .…”

Section: Resultsmentioning

confidence: 99%

“…A theory developed recently by Kappus et al 21 suggested that sonoluminescence was essentially the result of Mott effect in noble-gas-element plasmas. They proposed a classical chemical model with Debye-Hückle screening, which showed that the lowering of IP was greatly enhanced by the ionization process, making a sharp increase in ionization possible at a much lower density than that predicted by prior theories 22 . If so, this would lead to a significant revision to the physical picture of Mott effect, and consequently an updated understanding of the ionization mechanism of partially degenerate plasmas.…”

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confidence: 99%

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First-Principles Investigation to Ionization of Argon Under Conditions Close to Typical Sonoluminescence Experiments

Kang

Zhao

Zhang

et al. 2016

Sci Rep

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Mott effect, featured by a sharp increase of ionization, is one of the unique properties of partially ionized plasmas, and thus of great interest to astrophysics and inertial confinement fusion. Recent experiments of single bubble sonoluminescence (SBSL) revealed that strong ionization took place at a density two orders lower than usual theoretical expectation. We show from the perspective of electronic structures that the strong ionization is unlikely the result of Mott effect in a pure argon plasma. Instead, first-principles calculations suggest that other ion species from aqueous environments can energetically fit in the gap between the continuum and the top of occupied states of argon, making the Mott effect possible. These results would help to clarify the relationship between SBSL and Mott effect, and further to gain an better understanding of partially ionized plasmas.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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First-Principles Investigation to Ionization of Argon Under Conditions Close to Typical Sonoluminescence Experiments

Kang

Zhao

Zhang

et al. 2016

Sci Rep

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“…On the other side, X-ray lasers can be used to probe the ion structure, electronic charge states, thermodynamic, and optical properties of dense plasmas [6]. Equations of state, compositions, transport and optical properties of dense plasmas [7,8] are also needed for radiation hydrodynamic simulations as well as for interpretation of plasma emission spectra.…”

Section: Introductionmentioning

confidence: 99%

Atomic and optical properties of warm dense copper

Miloshevsky

Hassanein

2015

Phys. Rev. E

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The emission of X-rays from warm dense matter is of great interest for both spectroscopic diagnostics and development of intense X-ray sources. We report the results from the collisionalradiative steady state (CRSS) modeling of atomic and optical properties of copper plasmas at near-solid and solid-state density for a range of temperatures. The CRSS model is validated against the available data on the average charge state and shifts of energy levels in aluminum and the opacity and emissivity spectra of carbon and aluminum plasmas. The average charge states, number density of ion species, and free electrons as a function of temperature are investigated for the solid-density copper plasma. Due to dense plasma environment the four outer electrons are found to be unbounded even in the low-temperature limit ~1 eV. As the temperature changes from 1 eV to 100 eV, the predominant species vary from five-fold to twelve-fold ionized copper ions. The opacity and emissivity spectra of dense copper plasmas are studied using the local thermodynamic equilibrium (LTE) and non-LTE approaches. It is found that the non-LTE effects are important in the spectral region of soft X-rays emitted from the K-shell. The emissivity in spectral lines is completely suppressed indicating the importance of the energy-dissipating radiative processes in this soft X-ray region. The line broadening and red shifts of the K-shell 2 and L-shell spectral lines toward higher wavelengths are observed with the increase of plasma density. These results have important implications for understanding the radiative properties of warm dense copper and can be useful for future experimental studies. * gennady@purdue.edu 3

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Elastic scattering of electron in neutral plasma: Interaction model and plasma environment effects

2020

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Elastic scattering of electrons in a plasma is studied for its pivotal role in relating transport properties to plasma composition. A unified effective potential model is developed to describe the interactions between electrons and atoms/ions in plasma. It not only contains the static Coulomb, polarization, and exchange interaction but also considers plasma environment effects with a Muffin-tin model based on the Roothaan–Hartree–Fock atomic wave functions. For electron–electron and electron–ion interactions, the dynamical screening effect is also considered by a velocity-dependent screening length. The validity of the potential model is demonstrated in the specific case of argon plasma. The calculated differential, total, and momentum transfer cross sections, as well as the electrical conductivities at varying plasma densities and temperatures, are compared to available experimental data and other calculations. These comparisons indicate that the proposed potential has correct low density limit behavior and works well for plasma in a wide range of densities and temperatures, including warm dense matter.

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Equations of state, transport properties, and compositions of argon plasma: Combination of self-consistent fluid variation theory and linear response theory

Cited by 7 publications

References 59 publications

First-Principles Investigation to Ionization of Argon Under Conditions Close to Typical Sonoluminescence Experiments

First-Principles Investigation to Ionization of Argon Under Conditions Close to Typical Sonoluminescence Experiments

Atomic and optical properties of warm dense copper

Elastic scattering of electron in neutral plasma: Interaction model and plasma environment effects

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