Nonlinear Structure of the Diffusing Gas-Metal Interface in a Thermonuclear Plasma

Molvig, Kim; Vold, Erik; Dodd, E. S.; Wilks, S. C.

doi:10.1103/physrevlett.113.145001

Cited by 37 publications

(12 citation statements)

References 18 publications

(27 reference statements)

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“…For instance, diffusion can be responsible for the formation of chemical inhomogeneities which influence emission, heat transport, conductivity, etc see, e.g., [1][2][3]. In fusion experiments, the source of trace elements is usually the chamber walls, and diffusion determines the penetration depth of these elements and their distribution in plasma see, e.g., [4][5][6]. Even a small admixture of heavy ions increases drastically radiative losses of plasma and changes its thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Chemical Spots and Vortices Caused By the Current-Driven Diffusion in Plasma

Урпин¹

2018

BJSTR

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We consider diffusion caused by a combined influence of the electric current and Hall effect, and argue that such diffusion can form in homogeneities of a chemical composition in plasma. Such current-driven diffusion can be accompanied by prop-agation of a particular type of waves in which the impurity number density oscillates alone. These compositional waves exist if the magnetic pressure in plasma is greater than the gas pressure.

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Section: Introductionmentioning

confidence: 99%

Chemical Spots and Vortices Caused By the Current-Driven Diffusion in Plasma

Урпин¹

2018

BJSTR

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“…Understanding this behavior is crucial, so much so that experiments are designed to monitor and control mixing of the ablator into the fuel. Further motivation comes from the mixing of a gas/metal interface [5][6][7]. In such cases, interfaces lead to strong concentration gradients and mixing.…”

Section: Introductionmentioning

confidence: 99%

Transport properties of an asymmetric mixture in the dense plasma regime

et al. 2016

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We study how concentration changes ionic transport properties along isobars-isotherms for a mixture of hydrogen and silver, representative of turbulent layers relevant to inertial confinement fusion (ICF) and astrophysics. Hydrogen will typically be fully ionized while silver will be only partially ionized but can have a large effective charge. This will lead to very different physical conditions for the H and Ag. Large first principles orbital free molecular dynamics (OFMD) simulations are performed and the resulting transport properties are analyzed. Comparisons are made with transport theory in the kinetic regime and in the coupled regime. The addition of a small amount of heavy element in a light material has a dramatic effect on viscosity and diffusion of the mixture. This effect is explained through kinetic theory as a manifestation of a crossover between classical diffusion and Lorentz diffusion.

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“…For instance, diffusion can be responsible for the formation of chemical inhomogeneities which influence emission, heat transport, conductivity, etc ( [1][2][3]). In thermonuclear fusion experiments, the source of impurities is usually the chamber walls, and diffusion determines the penetration depth of these impurities and their distribution in plasma ( [4][5][6]). Even a small admixture of heavy ions increases drastically radiative losses of plasma and changes its thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of heavy ions diffusion under the influence of current-driven mechanism and compositional waves in plasma

Урпин¹

2016

Preprint

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We consider diffusion caused by a combined influence of the Hall effect and electric currents, and argue that such diffusion forms chemical inhomogeneities in plasma. The considered mechanism can be responsible for the formation of element spots in laboratory and astrophysical plasmas.Such current-driven diffusion can be accompanied by the propagation of a paticular type of waves which have not been considered earlier. In these waves, the impurity number density oscillates alone and their frequency is determined by the electric currents and sort of impurity ions. These compositional waves exist if the magnetic pressure in plasma is much greater than the gas pressure.Such waves lead to local variations of chemical composition in plasma and, hence, can manifest themself by variations of the emission in spectral lines.

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Nonlinear Structure of the Diffusing Gas-Metal Interface in a Thermonuclear Plasma

Cited by 37 publications

References 18 publications

Chemical Spots and Vortices Caused By the Current-Driven Diffusion in Plasma

Chemical Spots and Vortices Caused By the Current-Driven Diffusion in Plasma

Transport properties of an asymmetric mixture in the dense plasma regime

Investigation of heavy ions diffusion under the influence of current-driven mechanism and compositional waves in plasma

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