An analytical force balance model for dust particles with size up to several Debye lengths

D.U.B. Aussems, S.A. Khrapak, I. Doǧan, M.C.M. van de Sanden, T.W. Morgan

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
101 Downloads (Pure)

Abstract

In this study, we developed a revised stationary force balance model for particles in the regime a/λD<10. In contrast to other analytical models, the pressure and dipole force were included too, and for anisotropic plasmas, a novel contribution to the dipole moment was derived. Moreover, the Coulomb logarithm and collection cross-section were modified. The model was applied on a case study where carbon dust is formed near the plasma sheath in the linear plasma device Pilot-PSI. The pressure force and dipole force were found to be significant. By tracing the equilibrium position, the particle radius was determined at which the particle deposits. The obtained particle radius agrees well with the experimentally obtained size and suggests better agreement as compared to the unrevised model.

Original languageEnglish
Article number113702
Number of pages11
JournalPhysics of Plasmas
Volume24
Issue number11
DOIs
Publication statusPublished - 1 Nov 2017

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