Dust voids in collision-dominated plasmas with negative ions.

Using fluid theory, the properties of voids in collision-dominated plasmas containing negative ions are studied. The profiles of the charged-particle densities in the void region are obtained. It is also shown that with an increase of the negative-ion concentration, the electric field, the ion drift velocity, the dust charge at the void edge, as well as the void size decrease. [ABSTRACT FROM AUTHOR]