Study of self-organization chains of dust particles considering the strength of ionic drawing

The results of a numerical study of the equilibrium parameters of a one-dimensional chain consisting of three dust particles levitating in the electric fields of a gas-discharge plasma are presented. A numerical model is considered in which the motion of dust particles is simulated taking into account the action of the Coulomb repulsion force, external electric field, gravity, electrostatic force induced by the space charge of the plasma, as well as the ion drag force described analytically. A comparison has been made of the spatial distributions of the plasma space charge and potential around dust particles, as well as the equilibrium structural parameters of a chain of dust particles, depending on whether the ion drag force is taken into account analytically or not. It is shown that when the force of ion drag is taken into account analytically, the chain of dust particles as a whole is displaced in the direction of the ion flow. In this case, the distances between dust particles turn out to be smaller than in the case of neglecting the force of ion drag.