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Träfflista för sökning "WFRF:(Gervasini G) srt2:(2010-2014)"

Search: WFRF:(Gervasini G) > (2010-2014)

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1.
  • Laguardia, L., et al. (author)
  • Formation of dust in low-pressure magnetized hydrocarbon plasmas
  • 2011
  • In: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 13, s. 063006-
  • Journal article (peer-reviewed)abstract
    • The rapid formation of large molecules and the subsequent production of solid-state dust particles in a low-pressure discharge is unlikely, because of the low rates of the polymerization reactions and short lifetimes of the species. Here, we suggest that C dust particles can form in atypically low (10(-3) mbar)-pressure hydrocarbon plasmas if the dust charging time is much shorter than the gas residence time in the device; we present supporting experimental evidence for this. Such a condition can be obtained by the production of high-density plasmas. The results show that dust formation from the gaseous phase can occur in a much wider parameter range than is commonly assumed.
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2.
  • Ratynskaiy, Svetlana, et al. (author)
  • Plasma fluctuation spectra as a diagnostic tool for submicron dust
  • 2010
  • In: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 17:4, s. 043703-
  • Journal article (peer-reviewed)abstract
    • It is shown that the measurements of density fluctuation spectra in dusty plasmas can constitute a basis for in situ diagnostic of invisible submicron dust. The self-consistent kinetic theory that includes the charging processes and the natural density fluctuations of the dust particles predicts modifications of the spectra due to the presence of dust. A laboratory experiment was carried out where submicron dust was produced in a gas phase and diagnosed by surface analysis of samples and by measurements of its influence on the plasma density fluctuation spectra. Quantitative comparison of the latter with the theory yields information on dust density, size, and distribution in agreement with the results of the surface analysis. The method can be applied to various plasma environments in laboratory and space.
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  • Result 1-5 of 5

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