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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, 2018-09-03 - 2018-09-07, 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 iDORCID Put Code
Räth, ChristophDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIEDUNSPECIFIED
Morfill, Gregor E.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIEDUNSPECIFIED
Thomas, Hubertus M.UNSPECIFIEDhttps://orcid.org/0000-0001-8358-2023UNSPECIFIED
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 Start Date:3 September 2018
Event End Date:7 September 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:24 Apr 2024 20:28

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