Observation of Ω mode electron heating in dusty argon radio frequency discharges
The time-resolved emission of argon atoms in a dusty plasma has been measured with phase-resolved optical emission spectroscopy using an intensified charge-coupled device camera. For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the...
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Veröffentlicht in: | Physics of plasmas 2013-08, Vol.20 (8) |
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creator | Killer, Carsten Bandelow, Gunnar Matyash, Konstantin Schneider, Ralf Melzer, André |
description | The time-resolved emission of argon atoms in a dusty plasma has been measured with phase-resolved optical emission spectroscopy using an intensified charge-coupled device camera. For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the help of thermophoretic levitation. While electrons are exclusively heated by the expanding sheath (α mode) in the dust-free case, electron heating takes place in the entire plasma bulk when the discharge volume is filled with dust particles. Such a behavior is known as Ω mode, first observed in electronegative plasmas. Furthermore, particle-in-cell simulations have been carried out, which reproduce the trends of the experimental findings. These simulations support previous numerical models showing that the enhanced atomic emission in the plasma can be attributed to a bulk electric field, which is mainly caused by the reduced electrical conductivity due to electron depletion. |
doi_str_mv | 10.1063/1.4818442 |
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For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the help of thermophoretic levitation. While electrons are exclusively heated by the expanding sheath (α mode) in the dust-free case, electron heating takes place in the entire plasma bulk when the discharge volume is filled with dust particles. Such a behavior is known as Ω mode, first observed in electronegative plasmas. Furthermore, particle-in-cell simulations have been carried out, which reproduce the trends of the experimental findings. These simulations support previous numerical models showing that the enhanced atomic emission in the plasma can be attributed to a bulk electric field, which is mainly caused by the reduced electrical conductivity due to electron depletion.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.4818442</identifier><language>eng</language><publisher>United States</publisher><subject>ARGON ; ATOMS ; CAMERAS ; CHARGE-COUPLED DEVICES ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; DUSTS ; ELECTRIC CONDUCTIVITY ; ELECTRIC FIELDS ; ELECTRONS ; EMISSION SPECTROSCOPY ; HEATING ; HIGH-FREQUENCY DISCHARGES ; INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ; NUMERICAL ANALYSIS ; PLASMA DIAGNOSTICS ; PLASMA SHEATH ; PLASMA SIMULATION ; RADIOWAVE RADIATION ; SENSORS ; TIME RESOLUTION</subject><ispartof>Physics of plasmas, 2013-08, Vol.20 (8)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c187t-9948f2148e8e4c134bdfd14d1e53414d5c62959718aa456e987ac3c213008b193</citedby><cites>FETCH-LOGICAL-c187t-9948f2148e8e4c134bdfd14d1e53414d5c62959718aa456e987ac3c213008b193</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27923,27924</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22220699$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Killer, Carsten</creatorcontrib><creatorcontrib>Bandelow, Gunnar</creatorcontrib><creatorcontrib>Matyash, Konstantin</creatorcontrib><creatorcontrib>Schneider, Ralf</creatorcontrib><creatorcontrib>Melzer, André</creatorcontrib><title>Observation of Ω mode electron heating in dusty argon radio frequency discharges</title><title>Physics of plasmas</title><description>The time-resolved emission of argon atoms in a dusty plasma has been measured with phase-resolved optical emission spectroscopy using an intensified charge-coupled device camera. For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the help of thermophoretic levitation. While electrons are exclusively heated by the expanding sheath (α mode) in the dust-free case, electron heating takes place in the entire plasma bulk when the discharge volume is filled with dust particles. Such a behavior is known as Ω mode, first observed in electronegative plasmas. Furthermore, particle-in-cell simulations have been carried out, which reproduce the trends of the experimental findings. These simulations support previous numerical models showing that the enhanced atomic emission in the plasma can be attributed to a bulk electric field, which is mainly caused by the reduced electrical conductivity due to electron depletion.</description><subject>ARGON</subject><subject>ATOMS</subject><subject>CAMERAS</subject><subject>CHARGE-COUPLED DEVICES</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>DUSTS</subject><subject>ELECTRIC CONDUCTIVITY</subject><subject>ELECTRIC FIELDS</subject><subject>ELECTRONS</subject><subject>EMISSION SPECTROSCOPY</subject><subject>HEATING</subject><subject>HIGH-FREQUENCY DISCHARGES</subject><subject>INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY</subject><subject>NUMERICAL ANALYSIS</subject><subject>PLASMA DIAGNOSTICS</subject><subject>PLASMA SHEATH</subject><subject>PLASMA SIMULATION</subject><subject>RADIOWAVE RADIATION</subject><subject>SENSORS</subject><subject>TIME RESOLUTION</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNotUM1KAzEYDKJgrR58g4AnD1vzbbLZ5CjFPygUQcFbSJNv20i70WQr9JF8GZ_JlPa7zMfMMAxDyDWwCTDJ72AiFCgh6hMyAqZ01cpWnO7_llVSio9zcpHzJ2NMyEaNyOt8kTH92CHEnsaO_v3STfRIcY1uSIVbYdH6JQ099ds87KhNy0In60OkXcLvLfZuR33IblUkzJfkrLPrjFdHHJP3x4e36XM1mz-9TO9nlQPVDpXWQnU1CIUKhQMuFr7zIDxgw0XBxslaN7oFZa1oJGrVWsddDZwxtQDNx-TmkBvzEEx2YUC3crHvS3FTl2NS7123B5dLMeeEnflKYWPTzgAz-8UMmONi_B_xKl1m</recordid><startdate>20130801</startdate><enddate>20130801</enddate><creator>Killer, Carsten</creator><creator>Bandelow, Gunnar</creator><creator>Matyash, Konstantin</creator><creator>Schneider, Ralf</creator><creator>Melzer, André</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20130801</creationdate><title>Observation of Ω mode electron heating in dusty argon radio frequency discharges</title><author>Killer, Carsten ; Bandelow, Gunnar ; Matyash, Konstantin ; Schneider, Ralf ; Melzer, André</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c187t-9948f2148e8e4c134bdfd14d1e53414d5c62959718aa456e987ac3c213008b193</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>ARGON</topic><topic>ATOMS</topic><topic>CAMERAS</topic><topic>CHARGE-COUPLED DEVICES</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>DUSTS</topic><topic>ELECTRIC CONDUCTIVITY</topic><topic>ELECTRIC FIELDS</topic><topic>ELECTRONS</topic><topic>EMISSION SPECTROSCOPY</topic><topic>HEATING</topic><topic>HIGH-FREQUENCY DISCHARGES</topic><topic>INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY</topic><topic>NUMERICAL ANALYSIS</topic><topic>PLASMA DIAGNOSTICS</topic><topic>PLASMA SHEATH</topic><topic>PLASMA SIMULATION</topic><topic>RADIOWAVE RADIATION</topic><topic>SENSORS</topic><topic>TIME RESOLUTION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Killer, Carsten</creatorcontrib><creatorcontrib>Bandelow, Gunnar</creatorcontrib><creatorcontrib>Matyash, Konstantin</creatorcontrib><creatorcontrib>Schneider, Ralf</creatorcontrib><creatorcontrib>Melzer, André</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Killer, Carsten</au><au>Bandelow, Gunnar</au><au>Matyash, Konstantin</au><au>Schneider, Ralf</au><au>Melzer, André</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of Ω mode electron heating in dusty argon radio frequency discharges</atitle><jtitle>Physics of plasmas</jtitle><date>2013-08-01</date><risdate>2013</risdate><volume>20</volume><issue>8</issue><issn>1070-664X</issn><eissn>1089-7674</eissn><abstract>The time-resolved emission of argon atoms in a dusty plasma has been measured with phase-resolved optical emission spectroscopy using an intensified charge-coupled device camera. For that purpose, three-dimensional dust clouds have been confined in a capacitively coupled rf argon discharge with the help of thermophoretic levitation. While electrons are exclusively heated by the expanding sheath (α mode) in the dust-free case, electron heating takes place in the entire plasma bulk when the discharge volume is filled with dust particles. Such a behavior is known as Ω mode, first observed in electronegative plasmas. Furthermore, particle-in-cell simulations have been carried out, which reproduce the trends of the experimental findings. These simulations support previous numerical models showing that the enhanced atomic emission in the plasma can be attributed to a bulk electric field, which is mainly caused by the reduced electrical conductivity due to electron depletion.</abstract><cop>United States</cop><doi>10.1063/1.4818442</doi></addata></record> |
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subjects | ARGON ATOMS CAMERAS CHARGE-COUPLED DEVICES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DUSTS ELECTRIC CONDUCTIVITY ELECTRIC FIELDS ELECTRONS EMISSION SPECTROSCOPY HEATING HIGH-FREQUENCY DISCHARGES INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY NUMERICAL ANALYSIS PLASMA DIAGNOSTICS PLASMA SHEATH PLASMA SIMULATION RADIOWAVE RADIATION SENSORS TIME RESOLUTION |
title | Observation of Ω mode electron heating in dusty argon radio frequency discharges |
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