Abstract
The dielectric response function for modified dust acoustic waves is studied, incorporating the dipole moment and moment of inertia of finite sized elongated dust grains. Using this dielectric constant, generalized expressions for the Debye potential and for the wake potential are obtained due to a cluster of N2 dust grain projectiles moving with a constant velocity along the z-axis through a multi-component dusty plasma. For illustration, numerical results due to single, three, and six projectiles are presented with and without a dipole effect. A negative wake potential is observed behind each projectile in different geometeries.
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