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Measurement of the speed of sound by observation of the Mach cones in a complex plasma under microgravity conditions

Zhukhovitskii, Dmitry and Fortov, Vladimir and Molotkov, Vladimir and Lipaev, Andrey and Naumkin, Vadim and Thomas, Hubertus and Ivlev, Alexei and Schwabe, Mierk and Morfill, Gregor E. (2015) Measurement of the speed of sound by observation of the Mach cones in a complex plasma under microgravity conditions. Physics of Plasmas, 22 (2), 023701. American Institute of Physics (AIP). ISSN 1070-664X

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Official URL: http://dx.doi.org/10.1063/1.4907221

Abstract

We report the first observation of the Mach cones excited by a larger microparticle (projectile) moving through a cloud of smaller microparticles (dust) in a complex plasma with neon as a buffer gas under microgravity conditions. A collective motion of the dust particles occurs as propagation of the contact discontinuity. The corresponding speed of sound was measured by a special method of the Mach cone visualization. The measurement results are incompatible with the theory of ion acoustic waves. The estimate for the pressure in a strongly coupled Coulomb system and a scaling law for the complex plasma make it possible to derive an evaluation for the speed of sound, which is in a reasonable agreement with the experiments in complex plasmas.

Item URL in elib:https://elib.dlr.de/109402/
Document Type:Article
Title:Measurement of the speed of sound by observation of the Mach cones in a complex plasma under microgravity conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zhukhovitskii, Dmitryjoint institute for high temperatures, ras, moscowUNSPECIFIED
Fortov, Vladimirjoint institute for high temperatures, ras, moscowUNSPECIFIED
Molotkov, Vladimirjoint institute for high temperatures, ras, moscowUNSPECIFIED
Lipaev, Andreyjoint institute for high temperatures, ras, moscowUNSPECIFIED
Naumkin, Vadimjoint institute for high temperatures, ras, moscowUNSPECIFIED
Thomas, Hubertusdlr research group complex plasma, oberpfaffenhofenUNSPECIFIED
Ivlev, Alexeimax-planck-institut für extraterrestrische physik, giessenbachstrasse, 85748 garching, germanyUNSPECIFIED
Schwabe, Mierkmierk.schwabe (at) dlr.dehttps://orcid.org/0000-0001-6565-5890
Morfill, Gregor E.max-planck-institut für extraterrestrische physik, giessenbachstrasse, 85748 garching, germanyUNSPECIFIED
Date:2015
Journal or Publication Title:Physics of Plasmas
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:22
Page Range:023701
Publisher:American Institute of Physics (AIP)
ISSN:1070-664X
Status:Published
Keywords:complex plasma, plasma crystal, soft matter, microgravity, ISS
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:Research Group Complex Plasma
Deposited By: Thomas, Dr. Hubertus M.
Deposited On:12 Dec 2016 09:27
Last Modified:06 Sep 2019 15:18

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