Abstract
Dust charge and potential on static spherical dust grains located in an argon rf discharge under typical laboratory experiment conditions have been computed using a three-dimensional particle-particle-particle-mesh code. Elastic and inelastic collisions have been included in the current model to obtain realistic rf discharge plasma conditions. Dust charge, potential, and potential distribution around the dust have been computed for various sizes of dust placed at different locations in the rf discharge. The dust charge is found to be smaller than the values from the simple orbit motion limited model due to ion-neutral collisions. Further, the dust potential has been found to be increasing with dust size. Moreover, the shielding length of the dust has been found between electron and ion Debye lengths.
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