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Dust-plasma interaction in microgravity complex plasma experiments

Pustylnik, Mikhail (2016) Dust-plasma interaction in microgravity complex plasma experiments. ICPP 2016, Kaohsiung, Taiwan. (Unpublished)

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Micrometer-sized (micro- or dust) particles immersed in the normal laboratory gasdischarges accumulate very high electric charges on their surfaces. Electrostatic interaction energy of the microparticles in plasmas usually significantly exceeds energy of their chaotic motion. The system of microparticles is, therefore, strongly coupled and may be used as an atomistic model of solids and liquids. However, gravitational force plays an important role for the solid particles of micrometer size. To produce undisturbed 3-dimensional structures, microgravity is required. Under microgravity conditions, the microparticles fill practically the entire plasma volume, in most of the cases significantly affecting the plasma properties. The following physical mechanisms of microparticle (dust) and plasma interaction relevant for microgravity complex plasma experiments will be discussed. Microparticles in lowtemperature plasmas immobilize significant fraction of negative charge, their surface represents a sink of electrons and ions, interplay between the electrostatic and ion drag forces leads to strong inhomogeneities in the dust component. As a consequence, plasma parameters change locally and redistribute globally [1], new types of instabilities (e.g. heartbeat instability [2]) arise. The experiments performed on a laboratory prototype of PK3-plus space experiment and in parabolic flights with PK-4 facility will be presented. References: 1. S. Mitic et al., New J. Phys., 11, 083020, (2009). 2. M. Pustylnik et al., Phys. Plasmas, 19, 103701, (2012).

Item URL in elib:https://elib.dlr.de/110374/
Document Type:Conference or Workshop Item (Speech)
Title:Dust-plasma interaction in microgravity complex plasma experiments
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Pustylnik, Mikhaildlr research group complex plasma, oberpfaffenhofenUNSPECIFIEDUNSPECIFIED
Date:July 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:dusty plasmas; radiofrequency discharge; microgravity
Event Title:ICPP 2016
Event Location:Kaohsiung, Taiwan
Event Type:international Conference
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 / Zero gravity (old), R - Komplexe Plasmen / Laboratory research (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma > Research Group Complex Plasma
Deposited By: Pustylnik, Mikhail
Deposited On:09 Jan 2017 20:46
Last Modified:09 Jan 2017 20:46

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