Abstract
AbstractThis paper investigates the interaction of two dust particles in non‐equilibrium plasma at elevated pressures. On the basis of asymptotic shielding theory resulting in two‐exponential shielding the electrostatic energy of two charged fine particles is determined. The electrostatic energy dependence on interparticle distance proves to have a minimum as in an equilibrium plasma. The electrostatic interaction force of the particles is calculated. This force is proved to be non‐symmetric: for different charges the force acting on one dust particle was not equal to the force acting on the other dust particle. This is due to non‐symmetric charge separation in the vicinity of different charged dust particles. It is stated that likely charged particles repel each other and at the closest approach the attraction is only possible. Relationships to determine the modified nonideality parameter for the interaction potential, which consisted of two exponents with different shielding lengths, were obtained. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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