Isotope dependence of the type i ELMy H-mode pedestal in JET-ILW hydrogen and deuterium plasmas

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorHorvath, L.en_US
dc.contributor.authorMaggi, C. F.en_US
dc.contributor.authorChankin, A.en_US
dc.contributor.authorSaarelma, S.en_US
dc.contributor.authorField, A. R.en_US
dc.contributor.authorAleiferis, S.en_US
dc.contributor.authorBelonohy, E.en_US
dc.contributor.authorBoboc, A.en_US
dc.contributor.authorCorrigan, G.en_US
dc.contributor.authorDelabie, E. G.en_US
dc.contributor.authorFlanagan, J.en_US
dc.contributor.authorFrassinetti, L.en_US
dc.contributor.authorGiroud, C.en_US
dc.contributor.authorHarting, D.en_US
dc.contributor.authorKeeling, D.en_US
dc.contributor.authorKing, D.en_US
dc.contributor.authorMaslov, M.en_US
dc.contributor.authorMatthews, G. F.en_US
dc.contributor.authorMenmuir, S.en_US
dc.contributor.authorSilburn, S. A.en_US
dc.contributor.authorSimpson, J.en_US
dc.contributor.authorSips, A. C.C.en_US
dc.contributor.authorWeisen, H.en_US
dc.contributor.authorGibson, K. J.en_US
dc.contributor.author, JET Contributorsen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.organizationCulham Science Centreen_US
dc.contributor.organizationMax-Planck-Institut für Plasmaphysiken_US
dc.contributor.organizationDemokritos National Centre for Scientific Researchen_US
dc.contributor.organizationOak Ridge National Laboratoryen_US
dc.contributor.organizationKTH Royal Institute of Technologyen_US
dc.contributor.organizationSwiss Federal Institute of Technology Lausanneen_US
dc.contributor.organizationUniversity of Yorken_US
dc.date.accessioned2021-04-20T06:48:15Z
dc.date.available2021-04-20T06:48:15Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2022-03-09en_US
dc.date.issued2021-04en_US
dc.description| openaire: EC/H2020/633053/EU//EUROfusion
dc.description.abstractThe pedestal structure, edge transport and linear MHD stability have been analyzed in a series of JET with the ITER-like wall hydrogen (H) and deuterium (D) type I ELMy H-mode plasmas. The pedestal pressure is typically higher in D than in H at the same input power and gas rate, with the difference mainly due to lower density in H than in D (Maggi et al (JET Contributors) 2018 Plasma Phys. Control. Fusion 60 014045). A power balance analysis of the pedestal has shown that higher inter-ELM separatrix loss power is required in H than in D to maintain a similar pedestal top pressure. This is qualitatively consistent with a set of interpretative EDGE2D-EIRENE simulations for H and D plasmas, showing that higher edge particle and heat transport coefficients are needed in H than in D to match the experimental profiles. It has also been concluded that the difference in neutral penetration between H and D leads only to minor changes in the upstream density profiles and with trends opposite to experimental observations. This implies that neutral penetration has a minor role in setting the difference between H and D pedestals, but higher ELM and/or inter-ELM transport are likely to be the main players. The interpretative EDGE2D-EIRENE simulations, with simultaneous upstream and outer divertor target profile constraints, have indicated higher separatrix electron temperature in H than in D for a pair of discharges at low fueling gas rate and similar stored energy (which required higher input power in H than in D at the same gas rate). The isotope dependence of linear MHD pedestal stability has been found to be small, but if a higher separatrix temperature is considered in H than in D, this could lead to destabilization of peeling-ballooning modes and shrinking of the stability boundary, qualitatively consistent with the reduced pedestal confinement in H.en
dc.description.versionPeer revieweden
dc.identifier.citationHorvath, L, Maggi, C F, Chankin, A, Saarelma, S, Field, A R, Aleiferis, S, Belonohy, E, Boboc, A, Corrigan, G, Delabie, E G, Flanagan, J, Frassinetti, L, Giroud, C, Harting, D, Keeling, D, King, D, Maslov, M, Matthews, G F, Menmuir, S, Silburn, S A, Simpson, J, Sips, A C C, Weisen, H, Gibson, K J & JET Contributors 2021, ' Isotope dependence of the type i ELMy H-mode pedestal in JET-ILW hydrogen and deuterium plasmas ', Nuclear Fusion, vol. 61, no. 4, 046015 . https://doi.org/10.1088/1741-4326/abdd77en
dc.identifier.doi10.1088/1741-4326/abdd77en_US
dc.identifier.issn0029-5515
dc.identifier.issn1741-4326
dc.identifier.otherPURE UUID: 745042c3-1868-4d33-8d7c-fd8d7090babeen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/745042c3-1868-4d33-8d7c-fd8d7090babeen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85103200489&partnerID=8YFLogxKen_US
dc.identifier.otherPURE LINK: https://eprints.whiterose.ac.uk/174682/en_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/106889
dc.identifier.urnURN:NBN:fi:aalto-202104206183
dc.language.isoenen
dc.publisherIOP Publishing Ltd.
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/633053/EU//EUROfusionen_US
dc.relation.ispartofseriesNuclear Fusionen
dc.relation.ispartofseriesVolume 61, issue 4en
dc.rightsopenAccessen
dc.subject.keywordconfinementen_US
dc.subject.keywordH-modeen_US
dc.subject.keywordisotope effecten_US
dc.subject.keywordJET-ILWen_US
dc.subject.keywordpedestalen_US
dc.subject.keywordtokamaken_US
dc.titleIsotope dependence of the type i ELMy H-mode pedestal in JET-ILW hydrogen and deuterium plasmasen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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