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Anisotropy effects and synchronization during the mode-coupling instability

Laut, Ingo and Räth, Christoph and Zhdanov, Sergey and Nosenko, Vladimir and Lénaïc, Couëdel and Thomas, Hubertus (2016) Anisotropy effects and synchronization during the mode-coupling instability. First PK4 Symposium, 21.-22. Nov. 2016, Weßling. (Unpublished)

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Abstract

Two-dimensional complex plasma crystals are an ideal model system to study dynamic processes on the kinetic level. Recently, synchronized motion of alternating in-phase and anti-phase particle lines was observed during the so-called mode-coupling instability (MCI), where the out-of-plane wave mode of the crystal couples to the longitudinal mode. While MCI is equally strong in three directions for an ideal hexagonal lattice, it was observed in only two directions in the experiment. Here, we demonstrate with molecular dynamics simulations that an asymmetry in the horizontal confinement of the plasma crystal can cause this anisotropic ignition of MCI. The confinement asymmetry leads to a deformation of the hexagonal lattice that is typically observed in experiments. The instability is accompanied by synchronized particle motion that is characterized by a new order parameter. This order parameter is sensitive to the explicit direction-dependency of the synchronization pattern.

Item URL in elib:https://elib.dlr.de/108255/
Document Type:Conference or Workshop Item (Speech)
Title:Anisotropy effects and synchronization during the mode-coupling instability
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laut, IngoIngo.Laut (at) dlr.deUNSPECIFIED
Räth, Christophdlr research group complex plasma, oberpfaffenhofenUNSPECIFIED
Zhdanov, Sergeysergey.zhdanov (at) dlr.deUNSPECIFIED
Nosenko, Vladimirdlr research group complex plasma, oberpfaffenhofenUNSPECIFIED
Lénaïc, CouëdelCNRS, Aix-Marseille UniversitéUNSPECIFIED
Thomas, Hubertusdlr research group complex plasma, oberpfaffenhofenUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:complex plasma, synchronization, order parameter, anisotropy
Event Title:First PK4 Symposium
Event Location:Weßling
Event Type:international Conference
Event Dates:21.-22. Nov. 2016
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Data analysis, R - Komplexe Plasmen / Theory, Simulation
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma > Research Group Complex Plasma
Deposited By: Laut, Ingo
Deposited On:01 Dec 2016 19:25
Last Modified:01 Dec 2016 19:25

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