Classical bremsstrahlung in a non-ideal plasma with effective interaction

Wierling, A.; Millat, Thomas; Röpke, G.

doi:10.1017/s0022377803002538

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…We are particularly interested in the emission of luminescence out of a system. In metamaterials one can speculate about the possibility of placing additional sources inside the material whereas the atmospheric plasma can itself act as an emitter of incoherent light since it spontaneously emits incoherent light in the form of bremsstrahlung [18][19][20][21] due to the Coulomb interacting electrons and ions. In our previous theoretical approach [4] we have investigated the incoherent emission out of a plasma under the assumption that the extension of the plasma is considerably larger than typical electronic length scales like the scattering length or the thermal wavelength.…”

Section: Introductionmentioning

confidence: 99%

Light–matter interaction in finite‐size plasma systems

Hoyer

Kira

Koch

et al. 2007

Physica Status Solidi (b)

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It is well known that electromagnetic waves with frequencies below the plasma frequency cannot propagate inside an electron plasma. For plasmas with infinite extensions, this property can be mathematically described by a Bogoliubov transformation of the photonic operators. More generally, the presence of finite-size electron plasmas such as laser-induced atmospheric light strings or metallic nano structures including metamaterials leads to a modification of the light -matter interaction. It is shown how this geometric property can be fully accounted for with the help of adapted mode functions used for the quantization of the electromagnetic field. In addition to the analytical derivations, numerical results for luminescence spectra out of quasi-two-dimensional, planar plasma sheets are presented.

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Section: Introductionmentioning

confidence: 99%

Light–matter interaction in finite‐size plasma systems

Hoyer

Kira

Koch

et al. 2007

Physica Status Solidi (b)

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Mean force emission theory for classical bremsstrahlung in strongly coupled plasmas

Kinney,

LeFevre,

Kuranz

et al. 2024

Physics of Plasmas

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This work presents mean force emission theory, which extends the classical theory of bremsstrahlung emission to strongly coupled plasmas. In the high-frequency limit, the theory reduces to solving for the electron trajectory during a binary collision, but where the electron–ion interactions occur through the potential of mean force. In the low-frequency limit, it uses an autocorrelation formalism that captures effects of multiple collisions and strongly correlated motion. The predictions are benchmarked by comparison with first-principles classical molecular dynamics simulations of a fully ionized hydrogen plasma in which all interactions are repulsive. The comparison shows good agreement up to Coulomb coupling strengths of Γ∼30. The theory improves upon traditional models by including strong coupling effects and systematically including the effect of multiple collisions. Furthermore, mean force emission theory provides evidence that the Drude correction factor commonly used in quantum calculations of optical quantities may not be adequate at strong coupling.

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Molecular dynamics simulations of optical conductivity of dense plasmas

et al. 2005

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The optical conductivity sigma (omega) for dense Coulomb systems is investigated using molecular dynamics simulations on the basis of pseudopotentials to mimic quantum effects. Starting from linear response theory, the response in the long-wavelength limit k=0 can be expressed by different types of autocorrelation functions (ACF's) such as the current ACF, the force ACF, or the charge density ACF. Consistent simulation data for transverse as well as longitudinal ACF's are shown which are based on calculations with high numerical accuracy. Results are compared with perturbation expansions which are restricted to small values of the plasma parameter. The relevance with respect to a quantum Coulomb plasma is discussed. Finally, results are presented showing a consistent description of these model plasmas in comparison to quantum statistical approaches and to experimental data.

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Classical bremsstrahlung in a non-ideal plasma with effective interaction

Cited by 4 publications

References 22 publications

Light–matter interaction in finite‐size plasma systems

Light–matter interaction in finite‐size plasma systems

Mean force emission theory for classical bremsstrahlung in strongly coupled plasmas

Molecular dynamics simulations of optical conductivity of dense plasmas

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