Fig. 9: Dust particle size and density measurement.
From: Decoupling of dust cloud and embedding plasma for high electron depletion in nanodusty plasmas
a Kinetic Δ(Ψ)-Curve (filled circles). The measured values of Δ and Ψ change over time (see colorbar), as the particles size increases. The black curve is the fit of the Mie model. For larger particles a deviation of the model, due to multi-scattering, is expected34. The “clouds" of symbols along the curve show the settling of Δ and Ψ values after acetylene admixture was stopped. The inset is the SEM image of a typical a-C:H-particle. b Dust density profile for a dust radius of a = 140 nm. A line integrated, vertically resolved extinction measurement and the extinction efficiency Qext from kinetic Mie polarimetry is used to reconstruct the cylindrically symmetric 2D dust density profile nd(r, y).
