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dc.contributor.authorFredriksen, Åshild
dc.contributor.authorPécseli, Hans L
dc.contributor.authorTrulsen, Jan Karsten
dc.date.accessioned2021-06-07T08:01:08Z
dc.date.available2021-06-07T08:01:08Z
dc.date.issued2020-11-18
dc.description.abstractAnomalous transport due to large coherent structures, or coherent events, is studied experimentally in a magnetized toroidal discharge plasma. The present analysis emphasizes anomalous plasma losses as well as transport of electron thermal energy density across magnetic field lines. The experiment was carried out in the Blaamann device at the University of Tromsø. The diagnostics are based on data for potential, density and electron temperature variations as detected by Langmuir probes. Most of the data analysis uses conditional sampling. The flux of thermal energy density can be broken down into several components which are analyzed separately. Experimental means for obtaining the space-time variation of the complete polarization drifts are demonstrated, and the results compared with the fluctuating E × B<sub>0</sub>/<i>B</i><sup>2</sup><sub>0</sub>-velocities. For the present conditions these polarization drifts contribute only little to the plasma losses, but for other discharge parameters in heavier gases they can be important. Our results show that while the density, the potential and the electric field variations are dominated by large scales, the vorticity of the E × B<sub>0</sub>/<i>B</i><sup>2</sup><sub>0</sub>-flow as well as the ion polarization drifts are strongly intermittent.en_US
dc.identifier.citationFredriksen, Pécseli H, Trulsen J. Anomalous transport due to large coherent structures in a magnetized toroidal plasma. Plasma Physics and Controlled Fusion. 2020;63(1)en_US
dc.identifier.cristinIDFRIDAID 1862432
dc.identifier.doi10.1088/1361-6587/abc518
dc.identifier.issn0741-3335
dc.identifier.issn1361-6587
dc.identifier.urihttps://hdl.handle.net/10037/21366
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.relation.journalPlasma Physics and Controlled Fusion
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleAnomalous transport due to large coherent structures in a magnetized toroidal plasmaen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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