Effects of the neutral point of dust charge in plasma sheath

Details Effects of the neutral point of dust charge in plasma sheath Effects of the neutral point of dust charge in plasma sheath

2010-05-17

arxiv.org/abs/1005.2905v2

Physics

Plasma Physics

5 pages, 10 figures

Scientific paper

We numerically investigate the dust charging in the sheath, by using the usual fluid approximation, it is extended to include self consistently the dust charge variation. The grain charge becomes a new self consistent dynamic variable, it is found that dust grains are first charged negatively at the sheath edge and then begin to be charged positively in the sheath. The numerical results show that the initial velocity of dust charged grains, sized grains and the density ratio of ion to electron at the sheath edge have affected the neutral point of dust charge. Moreover, the neutral point of dust charge affects the spatial distribution of dust density.

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