Movies
Observation of Laser Pulse Induced Traveling Micro-Bubbles in Dusty Plasma Liquids
by Hong-Yu Chu, Yan-Kwen Chiu, Chia-Ling Chang, and Lin I
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Mpeg file frame rate |
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| Damped bubble at 200 mTorr | 5 Hz | 3 Hz |
| Traveling bubble at 185 mTorr | 5 Hz | 3 Hz |
| Bow shape wake trailing the bubble at 166 mTorr | 5 Hz | 3 Hz |
| Self organized dust density wave without laser ablation 140 mTorr | 5 Hz | 3 Hz |
15 ms exposure time for each frame
Dust plasma liquid can be formed by suspending dust particles in the low pressure discharge.
Induced by a pulsed 6 nsec Nd:YAG laser, the ablation of a suspended particle in the dusty plasma liquid
expels the surrounding dust particles and causes the formation of a nearly spherical bubble. Depending on the background gas pressure,
the bubble can damp right away, travel downward as a sphere, or induce wakes and self-organized dust density fluctuations. The above
movies are the side views illuminated by a thin laser sheet. The interparticle distance is about 0.3 mm.
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