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Formation of droplets in weightless complex plasmas

Joshi, Eshita and Khrapak, Sergey and Knapek, Christina A. and Huber, Peter and Mohr, Daniel P. and Schwabe, Mierk (2021) Formation of droplets in weightless complex plasmas. Contributions to Plasma Physics. Wiley. doi: 10.1002/ctpp.202100081. ISSN 0863-1042.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/ctpp.202100081


Microparticles immersed in a low-temperature plasma acquire strong negative charges and thus repel each other. Nevertheless, effective attraction between the microparticles in such a complex plasma can occur due to the interplay between the fluxes of plasma ions and the microparticles. Here, we report the observation of droplets formed in a complex plasma during a parabolic flight, and explain their formation in terms of the ion drag force that sustains the droplet. We have found a good agreement between the experimentally determined droplet size and its theoretical estimate using the ion drag force mechanism. Lower values of the electron temperature result in better agreement, as is consistent with the pulsed mechanism of discharge used experimentally.

Item URL in elib:https://elib.dlr.de/142588/
Document Type:Article
Additional Information:Theory work based on PK-3 Plus and Parabolic Flight data.
Title:Formation of droplets in weightless complex plasmas
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Joshi, EshitaUNSPECIFIEDhttps://orcid.org/0000-0001-8557-1141UNSPECIFIED
Khrapak, SergeyUNSPECIFIEDhttps://orcid.org/0000-0002-3393-6767UNSPECIFIED
Knapek, Christina A.UNSPECIFIEDhttps://orcid.org/0000-0001-7105-627XUNSPECIFIED
Huber, PeterUNSPECIFIEDhttps://orcid.org/0000-0002-1426-6104UNSPECIFIED
Mohr, Daniel P.UNSPECIFIEDhttps://orcid.org/0000-0002-9382-6586UNSPECIFIED
Schwabe, MierkUNSPECIFIEDhttps://orcid.org/0000-0001-6565-5890UNSPECIFIED
Date:30 May 2021
Journal or Publication Title:Contributions to Plasma Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:complex plasma, droplets, dust structures, dusty plasma, ion drag force
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 - Materials Research and Microgravity (MuM)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Joshi, Eshita
Deposited On:07 Jun 2021 08:46
Last Modified:24 May 2022 23:47

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