On the realization of the current-driven dust ion-acoustic instability

The current-driven dust ion-acoustic instability in a collisional dusty pla sma is studied. The effects of dust-charge variation, electron and ion capt ure by the dust grains, as well as various dissipative mechanisms leading t o the changes of the particles momenta, are taken into account. It is shown that the threshold for the excitation of the dust ion-acoustic waves can b e high because of the large dissipation rate induced by the dusts. (C) 1999 American Institute of Physics. [S1070-664X(99)04103-8].