A dusty double plasma device

A novel dusty plasma device to create spatially and temporally uniform stea dy state dusty plasma is described. An ultrasonic vibrator is used to vibra te a dust dispenser which disperses the dust uniformly through a fine mesh. A dusty plasma of large dimension with controllable dust density is produc ed. Measured dusty plasma parameters are compared with existing theories. S ome experimental results related to propagation characteristics of dust-ion -acoustic waves in a dusty plasma column are presented. (C) 1999 American I nstitute of Physics. [S0034-6748(99)04605-5].