Correlation between two non-linear events in a complex dusty plasma system

TL;DR

This paper develops a fluid theory model to explore how the decay of dust voids and solitons in a complex plasma system are influenced by the ionization parameter, revealing that soliton decay precedes void decay.

Contribution

It introduces a phenomenological fluid model linking dust void and soliton decay to the plasma ionization parameter, highlighting their correlated dynamics.

Findings

Dust void decay depends on ionization parameter.

Dust soliton stability is influenced by ionization parameter.

Soliton decay precedes dust void decay.

Abstract

A phenomenological model using fluid theory is developed to show that the decay of two seemingly independent nonlinear structures namely the dust void and dust soliton strongly depends on the plasma ionization parameter in an unmagnetized complex plasma system. Numerical solution of model equations has shown that the evolution of dust voids and their subsequent decay in a time frame is intimately related with the ionization parameter. A similar result also holds good in case of dust solitons where stability of soliton is found to depend critically upon ionization parameter. Most importantly, it is observed that time of the collapse of a dust soliton precedes the onset time of a dust void decay and therefore soliton decay acts as a precursor for void decay to occur in a given dusty plasma system.