title: Spectra of ion density and potential fluctuations in weakly ionized plasmas in the presence of dust grains.
abstract: The spectral densities of ion density and electrostatic potential fluctuations are derived in the framework of a self-consistent kinetic model of partially ionized dusty plasmas in the low-frequency regime. Neutral gas density can be responsible for significant modifications of the fluctuation level, hence the inclusion of the effect of neutrals is essential for a more realistic comparison with experiments, especially if spectral measurements are intended for dust diagnostic purposes. Comparison with the multicomponent model, attractive due to its simplicity as compared to the self-consistent one, is carried out to establish its limits of validity. Numerical calculations are performed for parameters typical of low-temperature plasma discharges. A criterion is derived for the omission of plasma discreteness in the low-frequency regime.
authors.affiliation: Space and Plasma Physics, Royal Institute of Technology, Stockholm, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Tolias
authors.forename: S
authors.initials: S
authors.lastname: Ratynskaia
authors.forename: U
authors.initials: U
authors.lastname: de Angelis