Experimental characterization of the active and passive fast-ion H-alpha emission in W7-X using FIDASIM

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPoloskei, Peter Zsen_US
dc.contributor.authorGeiger, B.en_US
dc.contributor.authorJansen van Vuuren, A.en_US
dc.contributor.authorÄkäslompolo, S.en_US
dc.contributor.authorFord, O.en_US
dc.contributor.authorSpanier, A.en_US
dc.contributor.authorNeelis, T. W.C.en_US
dc.contributor.authorMcNeely, P.en_US
dc.contributor.authorHartmann, D.en_US
dc.contributor.author, W7X-Teamen_US
dc.contributor.departmentSchool services,SCIen
dc.contributor.organizationMax-Planck-Institut für Plasmaphysiken_US
dc.contributor.organizationUniversity of Wisconsin-Madisonen_US
dc.contributor.organizationUniversity of Sevilleen_US
dc.contributor.organizationEindhoven University of Technologyen_US
dc.date.accessioned2024-01-17T08:34:49Z
dc.date.available2024-01-17T08:34:49Z
dc.date.issued2024-02en_US
dc.descriptionFunding Information: This work has been carried out within the framework of the EUROfusion consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under Grant Agreement Number 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. | openaire: EC/H2020/633053/EU//EUROfusion
dc.description.abstractThis paper presents the first results from the analysis of Balmer-alpha spectra at Wendelstein 7-X which contain the broad charge exchange emission from fast-ions. The measured spectra are compared to synthetic spectra predicted by the FIDASIM code, which has been supplied with the 3D magnetic fields from VMEC, 5D fast-ion distribution functions from ASCOT, and a realistic Neutral Beam Injection geometry including beam particle blocking elements. Detailed modeling of the beam emission shows excellent agreement between measured beam emission spectra and predictions. In contrast, modeling of beam halo radiation and Fast-Ion H-Alpha signals (FIDA) is more challenging due to strong passive contributions. While about 50% of the halo radiation can be attributed to passive signals from edge neutrals, the FIDA emission—in particular for an edge-localized line of sights—is dominated by passive emission. This is in part explained by high neutral densities in the plasma edge and in part by edge-born fast-ion populations as demonstrated by detailed modeling of the edge fast-ion distribution.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPoloskei, P Z, Geiger, B, Jansen van Vuuren, A, Äkäslompolo, S, Ford, O, Spanier, A, Neelis, T W C, McNeely, P, Hartmann, D & W7X-Team 2024, ' Experimental characterization of the active and passive fast-ion H-alpha emission in W7-X using FIDASIM ', Nuclear Fusion, vol. 64, no. 2, 026008 . https://doi.org/10.1088/1741-4326/ad0dd4en
dc.identifier.doi10.1088/1741-4326/ad0dd4en_US
dc.identifier.issn0029-5515
dc.identifier.issn1741-4326
dc.identifier.otherPURE UUID: eec14a5e-5aac-4bad-8365-4c5be3655528en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/eec14a5e-5aac-4bad-8365-4c5be3655528en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85181089588&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/133743541/Experimental_characterization_of_the_active_and_passive_fast-ion_H-alpha_emission_in_W7-X_using_FIDASIM.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/125895
dc.identifier.urnURN:NBN:fi:aalto-202401171570
dc.language.isoenen
dc.publisherInstitute of Physics Publishing
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/633053/EU//EUROfusionen_US
dc.relation.ispartofseriesNuclear Fusionen
dc.relation.ispartofseriesVolume 64, issue 2en
dc.rightsopenAccessen
dc.subject.keywordfast-particle diagnosticen_US
dc.subject.keywordforward modellingen_US
dc.subject.keywordplasma physicsen_US
dc.subject.keywordstellaratoren_US
dc.titleExperimental characterization of the active and passive fast-ion H-alpha emission in W7-X using FIDASIMen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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