Plasma oscillations and sound waves in collision-dominated two-component plasmas
Charge, mass, and electron density fluctuation spectra of strongly correlated, fully ionized two-component plasmas within the framework of the Mori--Zwanzig memory function formalism are analyzed. All dynamical correlation functions are expressed in terms of the memory functions of the ion and electron velocity autocorrelation functions by a generalized effective field approximation which preserves the exact initial values (i.e., static correlations). The theory reduces correctly to the mean field (or collisionless Vlasov) results in the weak coupling limit, and yields charge density fluctuation spectra in good agreement with available computer simulation data, as well as reasonable estimates of the transport coefficients. The collisional damping and frequency shift of the plasma oscillation mode are sizeable, even in the long wavelength limit. The theory also predicts the propagation of well-defined sound waves in dense plasmas in thermal equilibrium.
- Research Organization:
- Institut Max von Laue-Paul Langevin, 156 X, 38042 Grenoble Cedex, France
- OSTI ID:
- 5523063
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 25:4; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
COLLISIONAL PLASMA
DAMPING
FLUCTUATIONS
FREQUENCY DEPENDENCE
FUNCTIONS
PLASMA
PLASMA DENSITY
PLASMA WAVES
SOUND WAVES
SPECTRA
SPECTRAL SHIFT
VARIATIONS