Click to enlarge!
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 PK-4 in operation: Gravity is parallel to the electric field, gas flow is opposite. |
 PK-4 setup, tilted by 19o. A Langmuir probe is mounted on the upper port. |
 A probe wire is used as an obstacle in the flow of the particles. Note the tiny red dot (laser reflection on the wire), compare with picture to the right! |
 Time-lapse picture of micro-particles flowing around the obstacle (wire, bright spot left of the center) (right side is downwards, downstream). |
 Particle collision experiment: One cloud is trapped and a new one is injected. |
 The trapped particle cloud (pink glow), suspended above the lower RF plasma. |
 Particles before collision. The second cloud approaches from left (upwards). Field of view is 6.4 x 4.8 mm2. |
 Collision in progress. Particles penetrate from the left side. Note the lane formation of the stationary particles (right side)! |
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Watch the collision movie!
(flow07_2.mpg, 2.5 MB) |
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 Martin's nozzle experiment: Two RF(c) discharges create a nozzle where the particle flow is compressed. |
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 The two discharges still separated - also the particle clouds trapped within. |
 The discharges in contact. Particles flow through the 'nozzle' at the contact point. |
 Particles flowing through the nozzle (from right to left). Note how their velocity increases inside the nozzle! |
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