Dust mode in collisionally dominated complex plasmas with particle drift

• Experiments with flow of microparticles were conducted in a de discharge. A sharp threshold in the neutral gas pressure for the onset of an unstable low-frequency dust wave mode was observed. Highly space- and time-resolved measurements of the microparticle flow combined with probe measurements of the plasma parameters have allowed detailed comparison with a theoretical model. The model demonstrates good qualitative and quantitative agreement with the experimental results providing accurate estimates of the particle charge.

Nyckelord

complex (dusty) plasma

dust particle charge

dust waves

current glow-discharge

acoustic-waves

instability

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ref (ämneskategori)

art (ämneskategori)