Condensed Matter Physics, 2014, vol. 17, No. 1, 13502:1-11
Long-range interaction between dust grains in plasma
(Department of Theoretical Physics, Faculty of Physics, Mechnicov National University,
2 Dvoryanska St., 65026 Odessa, Ukraine)
The nature of long-range interactions between dust grains in plasma is discussed.
The dust grain interaction potential within a cell model of dusty plasma is introduced.
The attractive part of inter-grain potential is described by multipole interaction between
two electro-neutral cells. This allowed us to draw an analogy with molecular liquids
where attraction between molecules is determined by dispersion forces. Also main ideas
of the fluctuation theory for electrostatic field in cell model are formulated, and the
dominating contribution to attractive part of inter-grain potential is obtained.
dusty plasma, dust crystals, cell model, interaction potential, fluctuations