Open AccessAverage Size and Density of Clusters in Dusty Plasma
Author(s) -
Ye.V. Koskin,
G. S. Dragan,
A. Saad
Publication year - 2022
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe56.12.1290
Subject(s) - dusty plasma , plasma , debye , cluster (spacecraft) , atomic physics , debye length , work (physics) , electron , physics , charge density , maxima and minima , ion , molecular physics , condensed matter physics , materials science , quantum mechanics , mathematical analysis , mathematics , computer science , programming language
As is well known, metal and metal oxide dust particles either in combustion plasmas or in low-pressure gas-discharge plasmas are able to get a positive or negative charge. When the particles are identically charged, the Debye interparticle repulsion force arises. However, due to the additional interaction of grains with plasma electrons and ions, the resultant intergrain pair potential energy becomes non-Debye. As a result, it can cause local minima by certain plasma parameters. This case develops a quasimolecular structuralization, where two equally charged grains are spaced at a finite distance in equilibrium. The same principle of grain structuralization is valid for the multibody case where grains are associated in a crystal structure or clusters. The present work is devoted to the description of the dependence of the average size and the density of clusters on the interparticle potential. The general formula for the average cluster energy via the pair potential energy is derived.