dc.creator | Doerk, H. | es |
dc.creator | Challis, C. | es |
dc.creator | Citrin, J. | es |
dc.creator | García, J. | es |
dc.creator | Görler, T. | es |
dc.creator | Jenko, F. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-08-27T13:35:53Z | |
dc.date.available | 2020-08-27T13:35:53Z | |
dc.date.issued | 2016-11 | |
dc.identifier.citation | Doerk, H., Challis, C., Citrin, J., García, J., Görler, T., Jenko, F.,...,García Muñoz, M. (2016). Gyrokinetic study of turbulence suppression in a JET-ILW power scan. Plasma Physics and Controlled Fusion, 58 (11), 115005-. | |
dc.identifier.issn | 0741-3335 | es |
dc.identifier.uri | https://hdl.handle.net/11441/100494 | |
dc.description.abstract | For exploring tokamak operation regimes that deliver both high β and good energy
confinement, power scans at JET with ITER-like wall have been performed. Relatively weak
degradation of the confinement time coincides with increased core temperature of the ions
at high power. The changes in core turbulence characteristics during a power scan with an
optimized (broad) q profile are analyzed by means of nonlinear gyrokinetic simulations. The
increase in β is crucial for stabilizing ion temperature gradient driven turbulence, accompanied
by increased ion to electron temperature ratio, the presence of a dynamic fast ion species,
as well as the geometric stabilization by increased thermal and suprathermal pressure. A
sensitivity study with respect to the q profile reveals that electromagnetic effects are more
pronounced at larger values of q. Further, it is confirmed that turbulence suppression due
to rotation becomes less effective in such strongly electromagnetic systems. Electrostatic
simplified models may thus perform well in present-day devices, in which high β is often
correlated with high rotation, but provide poor extrapolation towards low rotation devices.
Implications for ITER and reactor plasmas are discussed. | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.description.sponsorship | European Unions Seventh Framework Programme FP7/2007–2013 | es |
dc.description.sponsorship | ERC 277870 | es |
dc.format | application/pdf | es |
dc.format.extent | 12 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Plasma Physics and Controlled Fusion, 58 (11), 115005-. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Tokamak | es |
dc.subject | Gyrokinetic simulation | es |
dc.subject | Thermal transport | es |
dc.subject | Electromagnetic turbulence | es |
dc.title | Gyrokinetic study of turbulence suppression in a JET-ILW power scan | 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 | FP7/2007–2013 | es |
dc.relation.projectID | 277870 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1088/0741-3335/58/11/115005 | es |
dc.identifier.doi | 10.1088/0741-3335/58/11/115005 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Plasma Physics and Controlled Fusion | es |
dc.publication.volumen | 58 | es |
dc.publication.issue | 11 | es |
dc.publication.initialPage | 115005 | es |