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Influence of temporal variations in plasma conditions on the electric potential near self-organized dust chains

Vermillion, Katrina and Sanford, Dustin and Matthews, Lorin and Hartmann, Peter and Rosenberg, Marlene and Kostadinova, Evdokiya and Carmona-Reyes, Jorge and Hyde, Truell and Lipaev, Andrey M. and Usachev, Alexandr D. and Zobnin, Andrey V. and Petrov, Oleg F. and Thoma, Markus H. and Pustylnik, Mikhail and Thomas, Hubertus M. and Ovchinin, Alexey (2022) Influence of temporal variations in plasma conditions on the electric potential near self-organized dust chains. Physics of Plasmas, 29 (2), 023701. American Institute of Physics (AIP). doi: 10.1063/5.0075261. ISSN 1070-664X.

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Official URL: https://dx.doi.org/10.1063/5.0075261

Abstract

Self-organization of dust grains into stable filamentary dust structures (or “chains”) largely depends on dynamic interactions between individual charged dust grains and complex electric potential arising from the distribution of charges within a local plasma environment. Recent studies have shown that the positive column of the gas discharge plasma in the Plasmakristall-4 (PK-4) experiment at the International Space Station supports the presence of fast-moving ionization waves, which lead to variations of plasma parameters by up to an order of magnitude from the average background values. The highly variable environment resulting from ionization waves may have interesting implications for the dynamics and self-organization of dust particles, particularly concerning the formation and stability of dust chains. Here, we investigate the electric potential surrounding dust chains in the PK-4 experiment by employing a molecular dynamics model of the dust and ions with boundary conditions supplied by a particle-in-cell with Monte Carlo collision simulation of the ionization waves. The model is used to examine the effects of the plasma conditions within different regions of the ionization wave and compare the resulting dust structure to that obtained by employing the time-averaged plasma conditions. The comparison between simulated dust chains and experimental data from the PK-4 experiment shows that the time-averaged plasma conditions do not accurately reproduce observed results for dust behavior, indicating that more careful treatment of plasma conditions in the presence of ionization waves is required. It is further shown that commonly used analytic forms of the electric potential do not accurately describe the electric potential near charged dust grains under these plasma conditions.

Item URL in elib:https://elib.dlr.de/187636/
Document Type:Article
Title:Influence of temporal variations in plasma conditions on the electric potential near self-organized dust chains
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vermillion, KatrinaUNSPECIFIEDUNSPECIFIED
Sanford, DustinUNSPECIFIEDUNSPECIFIED
Matthews, LorinUNSPECIFIEDUNSPECIFIED
Hartmann, PeterUNSPECIFIEDUNSPECIFIED
Rosenberg, MarleneUNSPECIFIEDUNSPECIFIED
Kostadinova, EvdokiyaUNSPECIFIEDUNSPECIFIED
Carmona-Reyes, JorgeUNSPECIFIEDUNSPECIFIED
Hyde, TruellUNSPECIFIEDUNSPECIFIED
Lipaev, Andrey M.UNSPECIFIEDUNSPECIFIED
Usachev, Alexandr D.UNSPECIFIEDUNSPECIFIED
Zobnin, Andrey V.UNSPECIFIEDUNSPECIFIED
Petrov, Oleg F.UNSPECIFIEDUNSPECIFIED
Thoma, Markus H.UNSPECIFIEDUNSPECIFIED
Pustylnik, MikhailMikhail.Pustylnik (at) dlr.deUNSPECIFIED
Thomas, Hubertus M.Hubertus.Thomas (at) dlr.dehttps://orcid.org/0000-0001-8358-2023
Ovchinin, AlexeyUNSPECIFIEDUNSPECIFIED
Date:February 2022
Journal or Publication Title:Physics of Plasmas
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:29
DOI:10.1063/5.0075261
Page Range:023701
Publisher:American Institute of Physics (AIP)
ISSN:1070-664X
Status:Published
Keywords:complex plasma, microgravity research
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Thomas, Dr. Hubertus M.
Deposited On:24 Aug 2022 14:53
Last Modified:24 Aug 2022 14:53

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