cylindrical electrode
1.A numerical dust void experiment has been preformed comparing to the experiment of [R. P. Dahiya et al., Phys. Rev. Lett. 89, 125001 (2002)]. The results of the two experiments agree extremely well. Then from the simulation, It is found that the formation of the dust void in the axisymmetric three dimensional sheath is due to a gentle potential bump in the central region of the electrode caused by the cylindrical geometry.
