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Synchronized motion in two-dimensional complex plasma crystals

Laut, Ingo and Räth, Christoph and Zhdanov, Sergey K. and Nosenko, Vladimir and Couëdel, Lénaïc and Thomas, Hubertus (2015) Synchronized motion in two-dimensional complex plasma crystals. 14th Workshop on the Physics of Dusty Plasmas, 26.-30. Mai 2015, Auburn, Alabama. (Unpublished)

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Abstract

Two-dimensional complex plasma crystals are an ideal model system to study dynamic processes [1]. Recently, synchronized motion of alternating in-phase and anti-phase particle lines was observed during mode-coupling instability (MCI), where the out-of-plane mode couples to the longitudinal mode [2]. The coupling allows energy to be transferred from the flowing ions in the plasma sheath to the crystal until the crystal melts. While MCI is equally strong in three directions for an ideal hexagonal lattice [3], it was observed in only two directions in Ref. [2]. Here, we demonstrate with molecular dynamics simulations that an asymmetry in the horizontal confinement of the plasma crystal can cause an 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. Depending on the orientation of the confinement asymmetry, MCI and synchronized motion are observed in one or two directions. The good agreement of simulation and experiment suggests that the confinement asymmetry can be used to explain the synchronized motion observed in experiments. [1] Morfill G. E. and Ivlev A. V., Rev. Mod. Phys., 81 1353 (2009). [2] L. Couëdel, S. Zhdanov, V. Nosenko, A. V. Ivlev, H. M. Thomas, and G. E. Morfill, Phys. Rev. E 89, 053108 (2014). [3] S. K. Zhdanov, A. V. Ivlev, and G. Morfill, Phys. Plasmas 16, 083706 (2009).

Item URL in elib:https://elib.dlr.de/97668/
Document Type:Conference or Workshop Item (Speech)
Title:Synchronized motion in two-dimensional complex plasma crystals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laut, IngoDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Räth, ChristophDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Zhdanov, Sergey K.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIED
Nosenko, VladimirMax-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIED
Couëdel, LénaïcCNRS, Aix-Marseille Université, Laboratoire de Physique des Interactions Ioniques etUNSPECIFIED
Thomas, HubertusDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Date:28 May 2015
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:Komplexe Plasmen, Synchronisation, Ordnungsparameter, complex plasma, synchonization, order parameter
Event Title:14th Workshop on the Physics of Dusty Plasmas
Event Location:Auburn, Alabama
Event Type:international Conference
Event Dates:26.-30. Mai 2015
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
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma
Deposited By: Laut, Ingo
Deposited On:30 Jul 2015 15:24
Last Modified:31 Jul 2019 19:54

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