DOI

In the present work, various scenarios of the spatial distributions of argon dusty plasma parameters are considered, focusing on the case of a large density of dust particles. It is shown that in this case a scenario with the inversion of the ambipolar field sign, considered in earlier studies by authors for plasma with heavy negative ions, can be realized. In this case, the ionization inside the dust cloud becomes small in comparison with the volume loss of charges inside the dust cloud, and the lack of charges is compensated by their arrival from the outer peripheral plasma region. This transition is accompanied by the phenomenon of the reversal of the sign of the radial electric field at the boundary of the dust cloud, and the formation of nonmonotonic profiles of the electron density with a shift of the maximum electron density from the center to the periphery. The radial stability of the dust particles cloud is provided by the balance of the increasing dust charge density gradient in the presence of the pushing out ambipolar field.

Original languageEnglish
Article number095020
JournalPlasma Sources Science and Technology
Volume28
Issue number9
Early online date29 Jul 2019
DOIs
StatePublished - 24 Sep 2019

    Research areas

  • DC discharge, DIFFUSIVE DECAY, GLOW-DISCHARGE, POSITIVE-COLUMN, argon, dusty plasma, electric field reversal, glow discharge plasma, numerical simulation

ID: 38632237