From voids to Yukawaballs and back

V. Land, W.J. Goedheer

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


When dust particles are introduced in a radio-frequency discharge under micro-gravity conditions, usually a dust free void is formed due to the ion drag force pushing the particles away from the center. Experiments have shown that it is possible to close the void by reducing the power supplied to the discharge. This reduces the ion density and with that the ratio between the ion drag force and the opposing electric force. We have studied the behavior of a discharge with a large amount of dust particles (radius 3.4 micron) with our hydrodynamic model, and simulated the closure of the void for conditions similar to the experiment. We also approached the formation of a Yukawa ball from the other side, starting with a discharge at low power and injecting batches of dust, while increasing the power to prevent extinction of the discharge. Eventually the same situation could be reached.

Original languageEnglish
Title of host publicationMultifacets of Dusty Plasmas— Fifth International Conference on the Physics of Dusty Plasmas, 18-23 May 2008, Ponte Degada, Portugal
Place of PublicationNew York
PublisherAmerican Institute of Physics
Number of pages4
ISBN (Print)9780735405691
Publication statusPublished - 2008
Externally publishedYes
Event5th International Conference on the Physics of Dusty Plasmas - Ponta Delgada, Azores, Portugal
Duration: 18 May 200823 May 2008

Publication series

NameAIP Conference Proceedings


Conference5th International Conference on the Physics of Dusty Plasmas
CityPonta Delgada, Azores


  • Ion drag
  • Micro-gravity
  • RF discharge
  • Simulation
  • Void
  • Yukawa ball


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