Transverse forces on dust particles in a magnetized sheath with crossed electric and magnetic fields

摘要

Recent experimental findings on the transverse forces acting on dust particles in a discharge under moderate magnetic fields [Puttscher and Melzer, Phys. Plasmas (1994-present) 21, 123704 (2014)] are compared to model calculations. Using the sheath model of Pandey et al. [Phys. Plasmas 18, 053703 (2011)], Mehdipour et al. [Phys. Plasmas 17, 123708 (2010)], and Foroutan et al. [Phys. Plasmas 16, 103703 (2009)], first, the plasma parameters of a magnetized sheath are calculated. From that, the horizontal forces on dust particles along or opposite to the E × B direction are determined. The experiments show a complex dependence of these forces on gas pressure in the discharge, magnetic field strength, and particle size. From the model, this complex behavior of the dust particles can be recovered with good agreement with the experimental findings.