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Dusty plasma; dust-acoustic mode; wake potential; plasma crystal; electrostatic wave and oscillations

The oscillatory wake potential for a slowly moving or static test dust particulate in a finite temperature, collisionless and unmagnetized dusty plasma with a continuous flow of ions and dust particles has been studied. The collective resonant interaction of the moving test particle with the low-frequency and low-phase-velocity dust-acoustic mode is the origin of the periodic attractive force between the like polarity particulates along and perpendicular to the streaming ions and dust grains resulting into dust-Coulomb crystal formation. This wake potential can explain the three-dimensional dust-Coulomb crystal formation in the laboratory conditions.

M Salahuddin¹ M K Islam¹ A K Banerjee¹ M Salimullah¹ S K Ghosh^{1 2}

1. Department of Physics, Jahangirnagar University, Savar, Dhaka - 1342, Bangladesh
2. School of Studies in Physics, Vikram University, Ujjain - 456 010, India

Published

September 2003

Manuscript revised

27 December 2001

Accepted

5 March 2003