Slowing of acoustic waves in electrorheological and string-fluid complex plasmas
The PK-4 laboratory consists of a direct current plasma tube into which microparticles are injected, forming a complex plasma. The microparticles acquire many electrons from the ambient plasma and are thus highly charged and interact with each other. If ion streams are present, wakes form downstream...
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| Veröffentlicht in: | New journal of physics 2020-08, Vol.22 (8), p.83079 |
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| creator | Schwabe, M Khrapak, S A Zhdanov, S K Pustylnik, M Y Räth, C Fink, M Kretschmer, M Lipaev, A M Molotkov, V I Schmitz, A S Thoma, M H Usachev, A D Zobnin, A V Padalka, G I Fortov, V E Petrov, O F Thomas, H M |
| description | The PK-4 laboratory consists of a direct current plasma tube into which microparticles are injected, forming a complex plasma. The microparticles acquire many electrons from the ambient plasma and are thus highly charged and interact with each other. If ion streams are present, wakes form downstream of the microparticles, which lead to an attractive term in the potential between the microparticles, triggering the appearance of microparticle strings and modifying the complex plasma into an electrorheological form. Here we report on a set of experiments on compressional waves in such a string fluid in the PK-4 laboratory during a parabolic flight and on board the International Space Station. We find a slowing of acoustic waves and hypothesize that the additional attractive interaction term leads to slower wave speeds than in complex plasmas with purely repulsive potentials. We test this hypothesis with simulations, and compare with theory. |
| doi_str_mv | 10.1088/1367-2630/aba91b |
| format | Article |
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The microparticles acquire many electrons from the ambient plasma and are thus highly charged and interact with each other. If ion streams are present, wakes form downstream of the microparticles, which lead to an attractive term in the potential between the microparticles, triggering the appearance of microparticle strings and modifying the complex plasma into an electrorheological form. Here we report on a set of experiments on compressional waves in such a string fluid in the PK-4 laboratory during a parabolic flight and on board the International Space Station. We find a slowing of acoustic waves and hypothesize that the additional attractive interaction term leads to slower wave speeds than in complex plasmas with purely repulsive potentials. We test this hypothesis with simulations, and compare with theory.</description><identifier>ISSN: 1367-2630</identifier><identifier>EISSN: 1367-2630</identifier><identifier>DOI: 10.1088/1367-2630/aba91b</identifier><identifier>CODEN: NJOPFM</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Acoustic waves ; complex plasma ; Direct current ; dusty density waves ; dusty plasma ; Dusty plasmas ; electrorheological fluid ; Electrorheological fluids ; International Space Station ; Laboratories ; microgravity ; Microparticles ; Multinational space ventures ; Parabolic flight ; Physics ; Plasma ; string fluid ; Strings ; Wakes</subject><ispartof>New journal of physics, 2020-08, Vol.22 (8), p.83079</ispartof><rights>2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft</rights><rights>2020. 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Phys</addtitle><description>The PK-4 laboratory consists of a direct current plasma tube into which microparticles are injected, forming a complex plasma. The microparticles acquire many electrons from the ambient plasma and are thus highly charged and interact with each other. If ion streams are present, wakes form downstream of the microparticles, which lead to an attractive term in the potential between the microparticles, triggering the appearance of microparticle strings and modifying the complex plasma into an electrorheological form. Here we report on a set of experiments on compressional waves in such a string fluid in the PK-4 laboratory during a parabolic flight and on board the International Space Station. We find a slowing of acoustic waves and hypothesize that the additional attractive interaction term leads to slower wave speeds than in complex plasmas with purely repulsive potentials. We test this hypothesis with simulations, and compare with theory.</description><subject>Acoustic waves</subject><subject>complex plasma</subject><subject>Direct current</subject><subject>dusty density waves</subject><subject>dusty plasma</subject><subject>Dusty plasmas</subject><subject>electrorheological fluid</subject><subject>Electrorheological fluids</subject><subject>International Space Station</subject><subject>Laboratories</subject><subject>microgravity</subject><subject>Microparticles</subject><subject>Multinational space ventures</subject><subject>Parabolic flight</subject><subject>Physics</subject><subject>Plasma</subject><subject>string fluid</subject><subject>Strings</subject><subject>Wakes</subject><issn>1367-2630</issn><issn>1367-2630</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>BENPR</sourceid><sourceid>DOA</sourceid><recordid>eNp1kUlrHDEQhZsQQya27zkKcvAlbZekXqSjGbIMGGywfRalbdKDptWRerz8-_S4zdiH5FRF8d5XW1F8oXBOQYgLypu2ZA2HC9Qoqf5QLA6lj-_yT8XnnDcAlArGFsXNbYiPXb8m0RM0cZfHzpBHfHCZdD1xwZkxxfTbxRDXncFAsLckj2mylD7sOktM3A7BPZEhYN5iPimOPIbsTl_jcXH_4_vd8ld5df1ztby8Kk1VibGUTcNk6xiTUDXAhbGSGtFIoSU6zxpNNYD3lFfM28oyNDWn2jQINWjElh8Xq5lrI27UkLotpmcVsVMvhZjWCtO0THDKamPZtC9HLiswTDtf1a3htTTMg5MT6-vMGlL8s3N5VJu4S_00vmIVF1IKWdeTCmaVSTHn5PyhKwW1_4HaH1ntj6zmH0yWs9nSxeGN2W8GxZgSCgSHVqrB-kn57R_K_4L_AlpRlW8</recordid><startdate>20200801</startdate><enddate>20200801</enddate><creator>Schwabe, M</creator><creator>Khrapak, S A</creator><creator>Zhdanov, S K</creator><creator>Pustylnik, M Y</creator><creator>Räth, C</creator><creator>Fink, M</creator><creator>Kretschmer, M</creator><creator>Lipaev, A M</creator><creator>Molotkov, V I</creator><creator>Schmitz, A S</creator><creator>Thoma, M H</creator><creator>Usachev, A D</creator><creator>Zobnin, A V</creator><creator>Padalka, G I</creator><creator>Fortov, V E</creator><creator>Petrov, O F</creator><creator>Thomas, H M</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>L7M</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0001-5809-9312</orcidid><orcidid>https://orcid.org/0000-0001-8358-2023</orcidid><orcidid>https://orcid.org/0000-0001-6565-5890</orcidid><orcidid>https://orcid.org/0000-0002-2559-3696</orcidid><orcidid>https://orcid.org/0000-0002-3393-6767</orcidid></search><sort><creationdate>20200801</creationdate><title>Slowing of acoustic waves in electrorheological and string-fluid complex plasmas</title><author>Schwabe, M ; 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Phys</addtitle><date>2020-08-01</date><risdate>2020</risdate><volume>22</volume><issue>8</issue><spage>83079</spage><pages>83079-</pages><issn>1367-2630</issn><eissn>1367-2630</eissn><coden>NJOPFM</coden><abstract>The PK-4 laboratory consists of a direct current plasma tube into which microparticles are injected, forming a complex plasma. The microparticles acquire many electrons from the ambient plasma and are thus highly charged and interact with each other. If ion streams are present, wakes form downstream of the microparticles, which lead to an attractive term in the potential between the microparticles, triggering the appearance of microparticle strings and modifying the complex plasma into an electrorheological form. Here we report on a set of experiments on compressional waves in such a string fluid in the PK-4 laboratory during a parabolic flight and on board the International Space Station. 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| subjects | Acoustic waves complex plasma Direct current dusty density waves dusty plasma Dusty plasmas electrorheological fluid Electrorheological fluids International Space Station Laboratories microgravity Microparticles Multinational space ventures Parabolic flight Physics Plasma string fluid Strings Wakes |
| title | Slowing of acoustic waves in electrorheological and string-fluid complex plasmas |
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