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Wave transmission across an interface in a complex plasma

Schwabe, Mierk and Du, Chengran and Sun, Wei and Yang, Li and Thomas, Hubertus M. (2019) Wave transmission across an interface in a complex plasma. DPG-Frühjahrstagung, 18.-22. Mär. 2019, München, Deutschland.

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Abstract

Complex plasmas consist of low-temperature plasmas with embedded microparticles. The microparticles acquire electric charges of thousands of electrons and strongly interact with each other. Due to their relatively large size and slow speed, their movement can be recorded with digital cameras and traced from frame to frame. Here, we study the propagation of waves across an interface formed between two subclouds of microparticles of different sizes. For this, we use data recorded under microgravity using the PK-3 Plus Laboratory on board the International Space Station, as well as Langevin dynamics simulations of a complex plasma. Firstly, we study how self-excited waves are transmitted across the interface and demonstrate that a collision zone and a merger zone form. Secondly, we study the propagation of a solitary wave across an interface and demonstrate that at low pressures, reflection at the interface can be observed.

Item URL in elib:https://elib.dlr.de/126946/
Document Type:Conference or Workshop Item (Speech)
Title:Wave transmission across an interface in a complex plasma
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwabe, MierkMierk.Schwabe (at) dlr.dehttps://orcid.org/0000-0001-6565-5890
Du, ChengranCollege of Science, Donghua University - 201620 Shanghai, PRCUNSPECIFIED
Sun, WeiCollege of Science, Donghua University - 201620 Shanghai, PRCUNSPECIFIED
Yang, LiCollege of Science, Donghua University - 201620 Shanghai, PRCUNSPECIFIED
Thomas, Hubertus M.Hubertus.Thomas (at) dlr.dehttps://orcid.org/0000-0001-8358-2023
Date:March 2019
Refereed publication:No
Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:komplexe Plasmen, staubige Plasmen, Wellen, Grenzflächen
Event Title:DPG-Frühjahrstagung
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:18.-22. Mär. 2019
Organizer:Deutsche Physikalische Gesellschaft
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:28 Mar 2019 08:37
Last Modified:28 Mar 2019 08:37

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