Spectra of ion density and potential fluctuations in weakly ionized plasmas in the presence of dust grains
2012 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, Vol. 85, no 2, 026408-1-026408-9 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2012. Vol. 85, no 2, 026408-1-026408-9 p.
spectral densities, complex plasmas, partially ionized plasmas, fluctuation theory, dust diagnostic
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-91510DOI: 10.1103/PhysRevE.85.026408ISI: 000300672700006ScopusID: 2-s2.0-84857735333OAI: oai:DiVA.org:kth-91510DiVA: diva2:510522
FunderSwedish Research Council
QC 201203162012-03-162012-03-162012-03-30Bibliographically approved