From voids to Yukawaballs and back

V. Land, W.J. Goedheer

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer 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.

Originele taal-2Engels
TitelMultifacets of Dusty Plasmas— Fifth International Conference on the Physics of Dusty Plasmas, 18-23 May 2008, Ponte Degada, Portugal
Plaats van productieNew York
UitgeverijAmerican Institute of Physics
Aantal pagina's4
ISBN van geprinte versie9780735405691
StatusGepubliceerd - 2008
Extern gepubliceerdJa
Evenement5th International Conference on the Physics of Dusty Plasmas - Ponta Delgada, Azores, Portugal
Duur: 18 mei 200823 mei 2008

Publicatie series

NaamAIP Conference Proceedings


Congres5th International Conference on the Physics of Dusty Plasmas
StadPonta Delgada, Azores


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