Influence of local-field corrections on Thomson scattering in collision-dominated two-component plasmas

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.81.026405· OSTI ID:21347426

Fortmann, Carsten ^[1]; Wierling, August; Roepke, Gerd ^[1]

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1. Institut fuer Physik, Universitaet Rostock, 18051 Rostock (Germany)

The dynamic structure factor, which determines the Thomson scattering spectrum, is calculated via an extended Mermin approach. It incorporates the dynamical collision frequency as well as the local-field correction factor. This allows to study systematically the impact of electron-ion collisions as well as electron-electron correlations due to degeneracy and short-range interaction on the characteristics of the Thomson scattering signal. As such, the plasmon dispersion and damping width is calculated for a two-component plasma, where the electron subsystem is completely degenerate. Strong deviations of the plasmon resonance position due to the electron-electron correlations are observed at increasing Brueckner parameters r{sub s}. These results are of paramount importance for the interpretation of collective Thomson scattering spectra, as the determination of the free electron density from the plasmon resonance position requires a precise theory of the plasmon dispersion. Implications due to different approximations for the electron-electron correlation, i.e., different forms of the one-component local-field correction, are discussed.

• OSTI ID: 21347426
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevE.81.026405; (c) 2010 The American Physical Society; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
CORRECTIONS
ELECTRON CORRELATION
ELECTRON DENSITY
ELECTRON-ION COLLISIONS
ELECTRONS
INTERACTION RANGE
PLASMA
RESONANCE
SPECTRA
STRUCTURE FACTORS
THOMSON SCATTERING
CALCULATION METHODS
COLLISIONS
CORRELATIONS
DIMENSIONLESS NUMBERS
DISTANCE
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
FERMIONS
INELASTIC SCATTERING
ION COLLISIONS
LEPTONS
SCATTERING