Diffusive transport of a 2-D magnetized dusty plasma cloud

TL;DR

This study investigates how charged dust particles in a 2-D magnetized dusty plasma cloud move and interact, using molecular dynamics simulations to understand transport behavior under magnetic fields relevant to industrial processes.

Contribution

It provides detailed insights into the transport coefficients of dusty plasma particles influenced by magnetic fields through large-scale MD simulations, a novel application in this context.

Findings

Transport coefficients depend on magnetic field strength.

Collisional processes significantly influence particle transport.

Magnetic field alters the dynamics of charged dust particles.

Abstract

Dusty plasma medium turns out to be an ideal system for studying the strongly coupled behavior of matter. The large size and slow response make their dynamics suitable to be captured through simple diagnostic tools. Furthermore, as the charge on individual particles is significantly higher than the electronic charge, the interaction amongst them can be in a strong coupling regime even at room temperatures and normal densities. Such charged dust particles are often present in several industrial plasma-based processes and can have a detrimental influence. For instance, in magnetrons, the sputtering phenomena may be affected by the accumulation of charged impurity clusters. The objective here is to understand the transport behavior of these particles in the presence of an externally applied magnetic field. For this purpose, Molecular Dynamics (MD) simulations are performed using an open-source large-scale atomic/molecular massively parallel simulator (LAMMPS). The dependence of the transport coefficient on the applied magnetic field and prevalent collisional processes has been discerned through simulations in detail.