Charge fluctuations and Hall effect in dusty plasmas

B. P. Pandey, S. V. Vladimirov

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Abstract

In a magnetized dusty plasma, Hall effect can arise due to collisional processes when, e.g., ion-dust collision decouples the ions from the magnetic field. In this case, due to the dust stoppage of the ions, the Hall electric field can be generated over large scales. The same collisional processes are also responsible for dust charge fluctuations. Therefore, the Hall effect and dust charge fluctuations are intricately linked to each other through the same mechanism. The inertial scale over which the Hall effect is dynamically important depends not only on the value of the grain charge times the ratio of the grain to the plasma (ion) number densities but also on the ratio of the ion-dust to the electron-dust collision frequencies. This scale can become arbitrarily large when these collision frequencies are comparable. We show that the charge dynamics, though linked to the Hall scale, does not directly affect the low frequency waves in the medium. Since charge fluctuation modifies the length scale over which Hall operates, the normal mode in such a medium is only indirectly affected although wave suffers weak damping due to collision.

Original languageEnglish
Article number083704
Pages (from-to)1-7
Number of pages7
JournalPhysics of Plasmas
Volume16
Issue number8
DOIs
Publication statusPublished - 2009

Bibliographical note

Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas, Volume 16, Issue 8, Article 083704 and may be found at http://link.aip.org/link/?PHPAEN/16/083704/1.

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