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Interaction of single-layer plasma crystals with upstream charged particles

Nosenko, V. and Du, C.-R. and Zhdanov, Sergey K. and Thomas, Hubertus and Morfill, Gregor E. (2015) Interaction of single-layer plasma crystals with upstream charged particles. 42nd EPS Conference on Plasma Physics, 22-26 June 2015, Lisbon, Portugal. (Unpublished)

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Abstract

In experiments with single-layer plasma crystals, one often observes extra particles outside of the main layer after injecting particles into plasma. Those particles, which can be agglomerates or contaminations, sometimes move at a high speed, disturb the lattice, and create wave patterns in it. When the extra particle speed is higher than the sound speed of the lattice, the disturbance forms a Mach cone. The Mach cones and wakes associated with extra particles moving beneath the lattice layer (downstream of the flow of ions) were well studied in the past decade. In the present work, we study for the first time the interaction of a single-layer plasma crystal with charged extra particles located above it (upstream of the flow of ions). Upstream extra particles tend to move between the rows of particles in the crystal, accelerate to supersonic speeds, and excite attraction-dominated Mach cones and wakes in the crystal. We attribute the particle - lattice layer attraction to the ion wake formed underneath the upstream extra particle.

Item URL in elib:https://elib.dlr.de/98151/
Document Type:Conference or Workshop Item (Speech)
Title:Interaction of single-layer plasma crystals with upstream charged particles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nosenko, V.v.nosenko (at) dlr.deUNSPECIFIED
Du, C.-R.College of Science, Donghua University, Shanghai, ChinaUNSPECIFIED
Zhdanov, Sergey K.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIED
Thomas, HubertusDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Morfill, Gregor E.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, GermanyUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:plasma crystal, Mach cone
Event Title:42nd EPS Conference on Plasma Physics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:22-26 June 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 / Laboratory research
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma
Deposited By: Nosenko, Volodymyr
Deposited On:02 Oct 2015 11:14
Last Modified:02 Oct 2015 11:14

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