Long-range attraction between particles in dusty plasma and partial surface tension of dusty phase boundary

Details Long-range attraction between particles in dusty plasma and partial surface tension of dusty phase boundary Long-range attraction between particles in dusty plasma and partial surface tension of dusty phase boundary

2003-04-23

arxiv.org/abs/physics/0304089v1

Physics

Plasma Physics

LATEX, REVTEX4, 7 pages, 6 figures

Scientific paper

10.1103/PhysRevE.69.046410

Effective potential of a charged dusty particle moving in homogeneous plasma has a negative part that provides attraction between similarly charged dusty particles. A depth of this potential well is great enough to ensure both stability of crystal structure of dusty plasma and sizable value of surface tension of a boundary surface of dusty region. The latter depends on the orientation of the surface relative to the counter-ion flow, namely, it is maximal and positive for the surface normal to the flow and minimal and negative for the surface along the flow. For the most cases of dusty plasma in a gas discharge, a value of the first of them is more than sufficient to ensure stability of lenticular dusty phase void oriented across the counter-ion flow.

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