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dc.contributor.authorFredriksen, Åshild
dc.contributor.authorPécseli, Hans
dc.contributor.authorTrulsen, Jan Karsten
dc.date.accessioned2018-11-01T10:02:59Z
dc.date.available2018-11-01T10:02:59Z
dc.date.issued2018-07-11
dc.description.abstractA simple magnetized plasma torus is modeled by using a 'top-hat' density variation. The benefit of this simplification is an exactly solvable model, allowing for a few additions, such as an externally maintained parabolic steady state potential variation imposed on the plasma. The combined effects of the resulting plasma rotation and the plasma polarization due to magnetic field gradient particle drifts can be described. The stabilizing and confining effects of plasma rotation are explicitly demonstrated. In a special high plasma density limit the results are confirmed by a more general model, indicating that the results of the top-hat model can be used with confidence in more general cases. A small vertical magnetic field component can be included for a plasma with neutral collisions and its influence on the electron dynamics studied. The effects of ion–neutral collisions are also included. The rotation and polarization of the plasma has different effects on the time variations of the plasma density and potential. As a reference we use data from the Blaamann device at the University of Tromsø obtained by a movable multi-probe, measuring variations in density, floating potential and an electric field component. The fluctuations in the plasma are characterized by auto-correlations and by cross-correlations between the signal from a fixed reference probe and data. The model accounts adequately for the phase variations of the signals for varying spatial multi-probe positions.en_US
dc.descriptionThis is an author-created, un-copyedited version of the article, Fredriksen, Å., Pécseli, H.L. & Trulsen, J.K. (2018). A solvable model for the basic properties of a simple magnetized plasma torus. Plasma Physics and Controlled Fusion, 60(085021). https://doi.org/10.1088/1361-6587/aacd2a, which has been accepted for publication/published in <i>Plasma Physics and Controlled Fusion</i>. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at <a href=https://doi.org/10.1088/1361-6587/aacd2a> https://doi.org/10.1088/1361-6587/aacd2a</a>.en_US
dc.identifier.citationFredriksen, Å., Pécseli, H.L. & Trulsen, J.K. (2018). A solvable model for the basic properties of a simple magnetized plasma torus. Plasma Physics and Controlled Fusion, 60(085021). https://doi.org/10.1088/1361-6587/aacd2aen_US
dc.identifier.cristinIDFRIDAID 1602970
dc.identifier.doi10.1088/1361-6587/aacd2a
dc.identifier.issn0741-3335
dc.identifier.issn1361-6587
dc.identifier.urihttps://hdl.handle.net/10037/14072
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.relation.journalPlasma Physics and Controlled Fusion
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.subjectmagnetized plasmasen_US
dc.subjectplasma equilibriumen_US
dc.subjectcorrelation measurementsen_US
dc.titleA solvable model for the basic properties of a simple magnetized plasma torusen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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