Dusty Plasma Bubble - Dust Acoustic Wave Interaction

Summary form only given. We experimentally investigate the interaction between dusty plasma bubble (DPB) and self-organized dust acoustic wave (DAW) in a low pressure dusty plasma liquid suspended in a weakly ionized low pressure rf discharge through video microscopy. The dusty plasma bubble (DPB) can be formed as dust particles are expelled by pulsed laser ablation on one of the particle in a dusty plasma liquid cluster suspended in weakly ionized low pressure discharge. DPB with dust depletion maintains its spherical shape and travels downward faster than the downward traveling DAW self-organized in the lower part of the liquid. The collision between DPB and DAW generates a wake with large density fluctuations trailing DPB. The detailed dust dynamics are discussed.