Magnetized Dusty Plasma Rotation and its Sensitivity to g x B

Dusty plasma rotation with applied magnetic fields have been reported primarily from experiments using capacitively coupled plasmas or glow discharge, many of which cite E x B as the primary rotation driver. Observations of dust rotation using inductively coupled discharges with applied steady axial magnetic fields are presented. We investigate the different mechanisms that lead to rotation and, in some cases, vertical flow and convection cells. In particular, the sensitivity of rotation to the orientation of the magnetic field with respect to gravity is explored. The vacuum chamber and magnets are mounted on a pivoting mechanism that can be oriented with respect to the vertical plane. Preliminary data indicates that the threshold for rotation may be highly sensitive to the magnitude of g x B. Observations and measurements of dust dynamics at various angular displacements are presented.