Low-frequency waves in collisional complex plasmas with an ion drift

A self-consistent model of low-frequency linear waves in collisional complex (dusty) plasmas with an ion drift is presented. Plasma conditions relevant to recent wave experiments under microgravity conditions are considered. Ion-neutral, ion-dust, and neutral-dust collisions, as well as external forces acting on the grains and grain charge variations in the presence of the wave are taken into account. A linear dispersion relation is obtained and some limiting cases are analyzed. Comparison of the obtained theoretical results with the experiments under microgravity conditions is presented. (C) 2003 American Institute of Physics.