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Observation of metallic sphere - complex plasma interactions in microgravity

Schwabe, Mierk and Zhdanov, Sergey and Hagl, Tanja C. and Huber, Peter and Lipaev, Andrey and Molotkov, Vladimir and Naumkin, Vadim and Rubin-Zuzic, Milenko and Vinogradov, P.V. and Zähringer, Erich and Fortov, Vladimir and Thomas, Hubertus M. (2017) Observation of metallic sphere - complex plasma interactions in microgravity. New Journal of Physics, 19, p. 103019. Institute of Physics (IOP) Publishing. DOI: 10.1088/1367-2630/aa868c ISSN 1367-2630

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Official URL: http://iopscience.iop.org/article/10.1088/1367-2630/aa868c


The PK-3 Plus laboratory on board the International Space Station is used to study the interaction between metallic spheres and a complex plasma. We show that the metallic spheres significantly affect both the local plasma environment and the microparticles. The spheres charge under the influence of the plasma and repel the microparticles, forming cavities surrounding the spheres. The size of the cavity around a sphere is used to study the force balance acting on microparticles at the cavity edge. We show that the ion drag force and pressure force from other microparticles balances with the electric force acting from the sphere to within 20%.
 At intermediate distances from the sphere surface, the interaction between the microparticles and the metallic spheres is attractive due to the drag force from the ions which are moving towards the highly charged spheres. The spheres thus strongly affect the plasma fluxes. This modification of the plasma flux can lead to an effective surface tension acting on the microparticles, and to the excitation of dust-density waves near the spheres, as the local electric field crosses a threshold.

Item URL in elib:https://elib.dlr.de/114840/
Document Type:Article
Title:Observation of metallic sphere - complex plasma interactions in microgravity
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schwabe, MierkMierk.Schwabe (at) dlr.dehttps://orcid.org/0000-0001-6565-5890
Zhdanov, Sergeysergey.zhdanov (at) dlr.deUNSPECIFIED
Hagl, Tanja C.Tanja.Hagl (at) dlr.deUNSPECIFIED
Huber, Peterp.huber (at) dlr.deUNSPECIFIED
Lipaev, Andreyjoint institute for high temperatures, ras, moscowUNSPECIFIED
Molotkov, Vladimirjoint institute for high temperatures, ras, moscowUNSPECIFIED
Naumkin, Vadimjoint institute for high temperatures, ras, moscowUNSPECIFIED
Rubin-Zuzic, Milenkomilenko.rubin-zuzic (at) dlr.deUNSPECIFIED
Vinogradov, P.V.rocket space corporation energia, 14070 korolev, moscow region, russiaUNSPECIFIED
Zähringer, Ericherich.zaehringer (at) dlr.deUNSPECIFIED
Fortov, Vladimirjoint institute for high temperatures, ras, moscowUNSPECIFIED
Thomas, Hubertus M.hubertus.thomas (at) dlr.deUNSPECIFIED
Date:20 October 2017
Journal or Publication Title:New Journal of Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.1088/1367-2630/aa868c
Page Range:p. 103019
Publisher:Institute of Physics (IOP) Publishing
Keywords:complex plasma, dusty plasma, waves, cavitation
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 / Zero gravity
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Schwabe, Dr. Mierk
Deposited On:23 Oct 2017 14:53
Last Modified:08 Mar 2018 18:47

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