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dc.contributor.authorKrawczyk, N.
dc.contributor.authorCzarnecka, A.
dc.contributor.authorIvanova-Stanik, I.
dc.contributor.authorZagórski, R.
dc.contributor.authorChallis, C.
dc.contributor.authorFrigione, D.
dc.contributor.authorGiroud, C.
dc.contributor.authorGraves, J.
dc.contributor.authorMantsinen, Mervi
dc.contributor.authorSilburn, S.
dc.contributor.authorJET Contributors
dc.contributor.otherBarcelona Supercomputing Center
dc.identifier.citationKrawczyk, N. [et al.]. Application of the VUV and the soft x-ray systems on JET for the study of intrinsic impurity behavior in neon seeded hybrid discharges. "Review of Scientific Instruments", 24 Octubre 2018, vol. 89, núm. 10.
dc.description.abstractThis paper reports on impurity behavior in a set of hybrid discharges with Ne seeding—one of the techniques considered to reduce the power load on reactor walls. A series of experiments carried out with light gas injection on JET with the ITER-Like-Wall (ILW) suggests increased tungsten release and impurity accumulation [C. Challis et al., Europhysics Conference Abstracts 41F, 2.153 (2017)]. The presented method relies mainly on the measurements collected by vacuum-ultra-violet and soft X-ray (SXR) diagnostics including the “SOXMOS” spectrometer and the SXR camera system. Both diagnostics have some limitations. Consequently, only a combination of measurements from these systems is able to provide comprehensive information about high-Z [e.g., tungsten (W)] and mid-Z [nickel (Ni), iron (Fe), copper (Cu), and molybdenum (Mo)] impurities for their further quantitative diagnosis. Moreover, thanks to the large number of the SXR lines of sight, determination of a 2D radiation profile was also possible. Additionally, the experimental results were compared with numerical modeling based on integrated simulations with COREDIV. Detailed analysis confirmed that during seeding experiments, higher tungsten release is observed, which was also found in the past. Additionally, it was noticed that besides W, the contribution of molybdenum to SXR radiation was greater, which can be explained by the place of its origin.
dc.description.sponsorshipThis 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 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This scientific work was partly supported by the Polish Ministry of Science and Higher Education within the framework of the scientific financial resources in the years 2014-2018 allocated for the realization of the international co-financed project.
dc.format.extent5 p.
dc.publisherAIP Publishing
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshFusion reactors
dc.subject.otherFusion reactors
dc.subject.otherJET plasmas
dc.titleApplication of the VUV and the soft x-ray systems on JET for the study of intrinsic impurity behavior in neon seeded hybrid discharges
dc.subject.lemacReactors de fusió
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/633053/EU/Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium/EUROfusion
upcommons.citation.publicationNameReview of Scientific Instruments

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