Assessment of filtered cameras for quantitative 2D analysis of divertor conditions during detachment in JET L-mode plasmas

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKarhunen, J.en_US
dc.contributor.authorLomanowski, B.en_US
dc.contributor.authorSolokha, V.en_US
dc.contributor.authorAleiferis, S.en_US
dc.contributor.authorCarvalho, P.en_US
dc.contributor.authorGroth, M.en_US
dc.contributor.authorLawson, K. D.en_US
dc.contributor.authorMeigs, A. G.en_US
dc.contributor.authorShaw, A.en_US
dc.contributor.author, JET Contributorsen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorFusion and Plasma Physicsen
dc.contributor.organizationDemokritos National Centre for Scientific Researchen_US
dc.contributor.organizationUniversidade de Lisboaen_US
dc.contributor.organizationJETen_US
dc.contributor.organizationOak Ridge National Laboratoryen_US
dc.date.accessioned2021-08-04T06:39:03Z
dc.date.available2021-08-04T06:39:03Z
dc.date.issued2021-08en_US
dc.description| openaire: EC/H2020/633053/EU//EUROfusion
dc.description.abstractEstimates for 2D distributions of electron temperature, Te, electron density, ne, and atomic deuterium density, n0, in the JET divertor volume have been inferred from deuterium Balmer line intensity ratios obtained from tomographic reconstructions of divertor camera measurements. This enables also investigation of ionization, Sion, and recombination, Srec, rates. The analysis shows a decrease of Te to 0.5-1.0 eV throughout the outer divertor during detachment in low-confinement (L-mode) plasmas. Simultaneously, the high-ne region and the n0 distribution in the outer divertor are observed to elongate and shift from the outer strike point towards the X-point. The observations are in qualitative agreement and follow the same sequence with modelling predictions of EDGE2D-EIRENE simulations of a density scan. While the method was found to provide good representation of the evolution of volumetric recombination during detachment, in agreement with the simulations, the movement of the ionization front upstream could not be followed due to lack of spatial overlap between the ionization region and the necessary emission distributions. Consequently, the representation of the ionization conditions and the particle balance in the detached outer divertor are compromised.en
dc.description.versionPeer revieweden
dc.format.extent15
dc.identifier.citationKarhunen, J, Lomanowski, B, Solokha, V, Aleiferis, S, Carvalho, P, Groth, M, Lawson, K D, Meigs, A G, Shaw, A & JET Contributors 2021, ' Assessment of filtered cameras for quantitative 2D analysis of divertor conditions during detachment in JET L-mode plasmas ', Plasma Physics and Controlled Fusion, vol. 63, no. 8, 085018 . https://doi.org/10.1088/1361-6587/ac0b9een
dc.identifier.doi10.1088/1361-6587/ac0b9een_US
dc.identifier.issn0741-3335
dc.identifier.issn1361-6587
dc.identifier.otherPURE UUID: 1a197267-dd3e-4d2f-886e-6e979e615c3een_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/1a197267-dd3e-4d2f-886e-6e979e615c3een_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85109875007&partnerID=8YFLogxKen_US
dc.identifier.otherPURE LINK: https://www.osti.gov/biblio/1860560en_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/108840
dc.identifier.urnURN:NBN:fi:aalto-202108048084
dc.language.isoenen
dc.publisherIOP Publishing Ltd.
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/633053/EU//EUROfusionen_US
dc.relation.ispartofseriesPlasma Physics and Controlled Fusionen
dc.relation.ispartofseriesVolume 63, issue 8en
dc.rightsopenAccessen
dc.subject.keywordcamera tomographyen_US
dc.subject.keyworddetachmenten_US
dc.subject.keyworddivertor physicsen_US
dc.subject.keywordfusionen_US
dc.subject.keywordspectroscopyen_US
dc.titleAssessment of filtered cameras for quantitative 2D analysis of divertor conditions during detachment in JET L-mode plasmasen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi

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