Correlation and spectrum of dust acoustic waves in a radio-frequency plasma using PK-4 on the International Space Station

J. Goree; Bin Liu; M. Y. Pustylnik; H. M. Thomas; V. E. Fortov; A. M. Lipaev; V. Molotkov; A. D. Usachev; O. F. Petrov; M. H. Thoma; E Thomas; U. Konopka; S. Prokopiev

doi:10.1063/5.0024500

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Correlation and spectrum of dust acoustic waves in a radio-frequency plasma using PK-4 on the International Space Station

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Correlation and spectrum of dust acoustic waves in a radio-frequency plasma using PK-4 on the International Space Station

J. Goree, Bin Liu, M. Y. Pustylnik, H. M. Thomas, V. E. Fortov, A. M. Lipaev, V. Molotkov, A. D. Usachev, O. F. Petrov, M. H. Thoma, …

Physics of plasmas, Vol.27(12), p.123701

12/01/2020

DOI: 10.1063/5.0024500

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Abstract

Dust acoustic waves were investigated in an experiment under microgravity conditions, using the European Space Agency-Roscosmos facility PK-4 on the International Space Station. A three-dimensional dust cloud was confined in a glow-discharge plasma powered by a radio-frequency coil in low-pressure neon gas. Low-frequency dust acoustic waves (DAWs) were spontaneously excited due to the flowing ions in the plasma. Dust motion was imaged using video cameras, yielding the position for individual dust particles. Besides these particle-level measurements, the dust was also measured as a fluid continuum to obtain its velocity and density fluctuations. A space-time diagram of the dust-fluid velocity reveals that the waves changed properties as they propagated across the dust cloud, in the direction of the ion flow. Density fluctuations were characterized by a wave spectrum, indicating the emergence of collective vibration modes in a broad range of wave numbers. The decay of the modes was characterized by density correlation functions. Fitting the correlation functions to an analytical model yields an experimental measurement of the dispersion relation for DAWs, which is compared to that of linear theory.

Physical Sciences

Physics

Physics, Fluids & Plasmas

Science & Technology

Details

Title: Subtitle: Correlation and spectrum of dust acoustic waves in a radio-frequency plasma using PK-4 on the International Space Station
Creators: J. Goree - University of Iowa
Bin Liu - University of Iowa
M. Y. Pustylnik - Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
H. M. Thomas - Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
V. E. Fortov - Joint Institute for High Temperatures
A. M. Lipaev - Joint Institute for High Temperatures
V. Molotkov - Joint Institute for High Temperatures
A. D. Usachev - Joint Institute for High Temperatures
O. F. Petrov - Joint Institute for High Temperatures
M. H. Thoma - Justus-Liebig-Universität Gießen
E Thomas - Auburn University
U. Konopka - Auburn University
S. Prokopiev - Gagarin Research and Test Cosmonaut Training Center
Resource Type: Journal article
Publication Details: Physics of plasmas, Vol.27(12), p.123701
DOI: 10.1063/5.0024500
ISSN: 1070-664X
eISSN: 1089-7674
Publisher: AIP Publishing
Number of pages: 8
Grant note: PHY-1740784; 1740379 / NSF; National Science Foundation (NSF) 50WM1441; 50WM1742 / DLR; Helmholtz Association; German Aerospace Centre (DLR) 20-12-00365 / Russian Science Foundation; Russian Science Foundation (RSF) 1571699; 1573629; 1579454 / NASA-JPL; National Aeronautics & Space Administration (NASA)
Language: English
Date published: 12/01/2020
Academic Unit: Physics and Astronomy; Mechanical Engineering
Record Identifier: 9984428681302771

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