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Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures

Yaroshenko, Victoriya and Pustylnik, Mikhail (2021) Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures. Molecules, 26 (2), 308(1)-308(11). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/molecules26020308. ISSN 1420-3049.

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Official URL: https://www.mdpi.com/journal/molecules

Abstract

Possible mechanisms of particle attraction providing formation of the field aligned microparticle strings in complex plasmas at elevated gas pressures are theoretically investigated in the light of the Plasmakristall-4 (PK-4) experiment on board the International Space Station. The particle interaction energy is addressed by two different approaches: (i) using the dynamically screened wake potential for small Mach numbers derived by Kompaneets et al., in 2016, and (ii) introducing effect of polarization of the trapped ion cloud by discharge electric fields. Is is found that both approaches yield the particle interaction energy which is independent of the operational discharge mode. In the parameter space of the performed experiments, the first approach can provide onset of the particle attraction and string formation only at gas pressures higher than 40–45 Pa, whilst the mechanism based on the trapped ion effect yields attraction in the experimentally important pressure range 20–40 Pa and may reconcile theory and observations.

Item URL in elib:https://elib.dlr.de/141303/
Document Type:Article
Title:Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Yaroshenko, VictoriyaVictoriya.Yaroshenko (at) dlr.deUNSPECIFIED
Pustylnik, MikhailMikhail.Pustylnik (at) dlr.deUNSPECIFIED
Date:9 January 2021
Journal or Publication Title:Molecules
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:26
DOI :10.3390/molecules26020308
Page Range:308(1)-308(11)
Editors:
EditorsEmailEditor's ORCID iD
Cirillo, GiuseppeUNSPECIFIEDUNSPECIFIED
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:MDPI
ISSN:1420-3049
Status:Published
Keywords:structural properties of fluids; plasma-related fluids; string fluids; complex plasmas; electrorheological plasmas; interaction potential
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 - Komplexe Plasmen / Theory, Simulation (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Yaroshenko, Victoriya
Deposited On:15 Mar 2021 08:31
Last Modified:15 Mar 2021 08:31

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