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Theory of a cavity around a large floating sphere in complex (dusty) plasma

Khrapak, Sergey and Huber, Peter and Thomas, Hubertus M. and Naumkin, Vadim and Molotkov, Vladimir and Lipaev, Andrey (2019) Theory of a cavity around a large floating sphere in complex (dusty) plasma. Physical Review E, 99, 053210. American Physical Society. DOI: 10.1103/PhysRevE.99.053210 ISSN 1539-3755

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In the last experiment with the PK-3 Plus laboratory onboard the International Space Station, interactions of millimeter-size metallic spheres with a complex plasma were studied [M. Schwabe et al., New J. Phys. 19, 103019 (2017)]. Among the phenomena observed was the formation of cavities (regions free of microparticles forming a complex plasma) surrounding the spheres. The size of the cavity is governed by the balance of forces experienced by the microparticles at the cavity edge. In this article we develop a detailed theoretical model describing the cavity size and demonstrate that it agrees well with sizes measured experimentally. The model is based on a simple practical expression for the ion drag force, which is constructed to take into account simultaneously the effects of nonlinear ion-particle coupling and ion-neutral collisions. The developed model can be useful for describing interactions between a massive body and surrounding complex plasma in a rather wide parameter regime.

Item URL in elib:https://elib.dlr.de/129071/
Document Type:Article
Title:Theory of a cavity around a large floating sphere in complex (dusty) plasma
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Khrapak, SergeySergey.Khrapak (at) dlr.deUNSPECIFIED
Huber, PeterDLR Research Group Complex Plasma, OberpfaffenhofenUNSPECIFIED
Thomas, Hubertus M.Hubertus.Thomas (at) dlr.dehttps://orcid.org/0000-0001-8358-2023
Naumkin, VadimJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Molotkov, VladimirJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Lipaev, AndreyJoint Institute for High Temperatures, RAS, MoscowUNSPECIFIED
Date:31 May 2019
Journal or Publication Title:Physical Review E
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1103/PhysRevE.99.053210
Page Range:053210
Publisher:American Physical Society
Keywords:complex (dusty) plasma, plasma-particle interactions, voids in complex plasmas, ion drag
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 / Theory, Simulation, R - Komplexe Plasmen / Zero gravity
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Khrapak, Sergey
Deposited On:11 Sep 2019 11:39
Last Modified:11 Sep 2019 11:39

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