dc.creator | Stefanikova, E. | es |
dc.creator | Frassinetti, L. | es |
dc.creator | Saarelma, S. | es |
dc.creator | Loarte, A. | es |
dc.creator | Nunes, I. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-07-15T17:44:53Z | |
dc.date.available | 2020-07-15T17:44:53Z | |
dc.date.issued | 2018-05 | |
dc.identifier.citation | Stefanikova, E., Frassinetti, L., Saarelma, S., Loarte, A., Nunes, I., Jet Contributors, y García Muñoz, M. (2018). Effect of the relative shift between the electron density and temperature pedestal position on the pedestal stability in JET-ILW and comparison with JET-C. Nuclear Fusion, 58 (5), 1-12. | |
dc.identifier.issn | 1741-4326 | es |
dc.identifier.uri | https://hdl.handle.net/11441/99505 | |
dc.description.abstract | The electron temperature and density pedestals tend to vary in their relative radial positions,
as observed in DIII-D (Beurskens et al 2011 Phys. Plasmas 18 056120) and ASDEX Upgrade
(Dunne et al 2017 Plasma Phys. Control. Fusion 59 14017). This so-called relative shift has
an impact on the pedestal magnetohydrodynamic (MHD) stability and hence on the pedestal
height (Osborne et al 2015 Nucl. Fusion 55 063018). The present work studies the effect of the
relative shift on pedestal stability of JET ITER-like wall (JET-ILW) baseline low triangularity
(δ) unseeded plasmas, and similar JET-C discharges. As shown in this paper, the increase of
the pedestal relative shift is correlated with the reduction of the normalized pressure gradient,
therefore playing a strong role in pedestal stability. Furthermore, JET-ILW tends to have a larger
relative shift compared to JET carbon wall (JET-C), suggesting a possible role of the plasma
facing materials in affecting the density profile location. Experimental results are then compared
with stability analysis performed in terms of the peeling-ballooning model and with pedestal
predictive model EUROPED (Saarelma et al 2017 Plasma Phys. Control. Fusion). Stability
analysis is consistent with the experimental findings, showing an improvement of the pedestal stability, when the relative shift is reduced. This has been ascribed mainly to the increase of
the edge bootstrap current, and to minor effects related to the increase of the pedestal pressure
gradient and narrowing of the pedestal pressure width. Pedestal predictive model EUROPED
shows a qualitative agreement with experiment, especially for low values of the relative shift. | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.description.sponsorship | Swedish Energy Agency 40146-1 | es |
dc.format | application/pdf | es |
dc.format.extent | 13 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Nuclear Fusion, 58 (5), 1-12. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | JET | es |
dc.subject | Pedestal position | es |
dc.subject | Pedestal | es |
dc.subject | Pedestal stability | es |
dc.subject | EUROPED | es |
dc.subject | Thomson scattering | es |
dc.title | Effect of the relative shift between the electron density and temperature pedestal position on the pedestal stability in JET-ILW and comparison with JET-C | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.projectID | 633053 | es |
dc.relation.projectID | 40146-1 | es |
dc.relation.publisherversion | https://doi.org/10.1088/1741-4326/aab216 | es |
dc.identifier.doi | 10.1088/1741-4326/aab216 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Nuclear Fusion | es |
dc.publication.volumen | 58 | es |
dc.publication.issue | 5 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 12 | es |