Influence of non-local thermodynamic equilibrium and Zeeman effects on magnetic equilibrium reconstruction using spectral motional Stark effect diagnostic

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dc.contributor.authorReimer, R.
dc.contributor.authorMarchuk, O.
dc.contributor.authorGeiger, B.
dc.contributor.authorMcCarthy, Patrick J.
dc.contributor.authorDunne, Michael G.
dc.contributor.authorHobirk, J.
dc.contributor.authorWolf, R.
dc.contributor.authorASDEX Upgrade Team
dc.contributor.funderH2020 Euratomen
dc.date.accessioned2018-04-25T11:42:20Z
dc.date.available2018-04-25T11:42:20Z
dc.date.issued2017-08-09
dc.date.updated2018-04-09T17:32:47Z
dc.description.abstractThe Motional Stark Effect (MSE) diagnostic is a well established technique to infer the local internal magnetic field in fusion plasmas. In this paper, the existing forward model which describes the MSE data is extended by the Zeeman effect, fine-structure, and relativistic corrections in the interpretation of the MSE spectra for different experimental conditions at the tokamak ASDEX Upgrade. The contribution of the non-Local Thermodynamic Equilibrium (non-LTE) populations among the magnetic sub-levels and the Zeeman effect on the derived plasma parameters is different. The obtained pitch angle is changed by 3°…4° and by 0.5°…1° including the non-LTE and the Zeeman effects into the standard statistical MSE model. The total correction is about 4°. Moreover, the variation of the magnetic field strength is significantly changed by 2.2% due to the Zeeman effect only. While the data on the derived pitch angle still could not be tested against the other diagnostics, the results from an equilibrium reconstruction solver confirm the obtained values for magnetic field strength.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid083509
dc.identifier.citationReimer, R., Marchuk, O., Geiger, B., McCarthy, P. J., Dunne, M., Hobirk, J., Wolf, R. and the ASDEX Upgrade Team (2017) 'Influence of non-local thermodynamic equilibrium and Zeeman effects on magnetic equilibrium reconstruction using spectral motional Stark effect diagnostic', Review of Scientific Instruments, 88(8), 083509 (10pp). doi:10.1063/1.4994889en
dc.identifier.doi10.1063/1.4994889
dc.identifier.endpage10en
dc.identifier.issn0034-6748
dc.identifier.issn1089-7623
dc.identifier.issued8en
dc.identifier.journaltitleReview of Scientific Instrumentsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/5872
dc.identifier.volume88en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::COFUND-EJP/633053/EU/Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium/EUROfusionen
dc.rights© 2017, the Authors. The following article appeared in Review of Scientific Instruments, 88(8), 083509 (10pp), doi:10.1063/1.4994889, and may be found at https://aip.scitation.org/doi/10.1063/1.4994889en
dc.subjectStark effecten
dc.subjectThermodynamicsen
dc.subjectZeeman effecten
dc.titleInfluence of non-local thermodynamic equilibrium and Zeeman effects on magnetic equilibrium reconstruction using spectral motional Stark effect diagnosticen
dc.typeArticle (peer-reviewed)en
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