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Self-propelled motion of a particle above a two-dimensional plasma crystal

Laut, Ingo and Räth, Christoph and Zhdanov, Sergey and Nosenko, Volodymyr and Morfill, Gregor E. and Thomas, Hubertus M. (2018) Self-propelled motion of a particle above a two-dimensional plasma crystal. In: Dynamic Days. Dynamics Days Europe 2018, 3.-7. Sep. 2018, Loughborough, GB.

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Plasma crystals consist of ordered arrangements of charged microparticles that levitate in a weakly ionized gas. Besides confining the particles, the plasma also alters the microparticle interaction, making it nonreciprocal. The nonreciprocal interactions cause interesting effects like the mode-coupling instability and the formation of particle strings or spinning particle pairs. Here, we analyze in simulations and theory the self-propelled motion of an "extra" particle floating above a two-dimensional plasma crystal. Previous experimental observations [1] showed that the extra particle is confined in a channel of two neighboring rows of particles and moves persistently through the crystal. We use the simple model of a pointlike ion wake charge to reproduce this intriguing effect in simulations. We show that the nonreciprocity of the particle interaction is responsible for a broken symmetry of the channel that enables the self-propelled motion of the extra particle [2] . [1] C.-R. Du, V. Nosenko, S. Zhdanov, H. M. Thomas, and G. E. Morfill, Phys. Rev. E 89, 021101(R) (2014) [2] I. Laut, C. Räth, S. K. Zhdanov, V. Nosenko, G. E. Morfill, and H. M. Thomas, Physical Rev. Lett. 118, 075002

Item URL in elib:https://elib.dlr.de/124697/
Document Type:Conference or Workshop Item (Speech)
Title:Self-propelled motion of a particle above a two-dimensional plasma crystal
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Laut, IngoIngo.Laut (at) dlr.deUNSPECIFIED
Räth, ChristophDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Zhdanov, SergeySergey.Zhdanov (at) dlr.deUNSPECIFIED
Nosenko, VolodymyrV.Nosenko (at) dlr.deUNSPECIFIED
Morfill, Gregor E.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIED
Thomas, Hubertus M.Hubertus.Thomas (at) dlr.dehttps://orcid.org/0000-0001-8358-2023
Journal or Publication Title:Dynamic Days
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:complex Plasmas, self propelled Motion, nonreciprocal interaction, channeling effect
Event Title:Dynamics Days Europe 2018
Event Location:Loughborough, GB
Event Type:international Conference
Event Dates:3.-7. Sep. 2018
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 / Data analysis (old), R - Komplexe Plasmen / Theory, Simulation (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Laut, Ingo
Deposited On:22 Jan 2019 14:33
Last Modified:28 Mar 2019 09:06

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