dc.creator | Wilkie, G.J. | es |
dc.creator | Iantchenko, A. | es |
dc.creator | Abel, I.G. | es |
dc.creator | Highcock, E. | es |
dc.creator | Pusztai, I. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-07-15T17:36:05Z | |
dc.date.available | 2020-07-15T17:36:05Z | |
dc.date.issued | 2018-08 | |
dc.identifier.citation | Wilkie, G.J., Iantchenko, A., Abel, I.G., Highcock, E., Pusztai, I., Jet Contributors, y García Muñoz, M. (2018). First principles of modelling the stabilization of microturbulence by fast ions. Nuclear Fusion, 58 (8), 1-15. | |
dc.identifier.issn | 1741-4326 | es |
dc.identifier.uri | https://hdl.handle.net/11441/99501 | |
dc.description.abstract | The observation that fast ions stabilize ion-temperature-gradient-driven microturbulence
has profound implications for future fusion reactors. It is also important in optimizing the
performance of present-day devices. In this work, we examine in detail the phenomenology
of fast ion stabilization and present a reduced model which describes this effect. This model
is derived from the high-energy limit of the gyrokinetic equation and extends the existing
‘dilution’ model to account for nontrivial fast ion kinetics. Our model provides a physicallytransparent explanation for the observed stabilization and makes several key qualitative
predictions. Firstly, that different classes of fast ions, depending on their radial density or
temperature variation, have different stabilizing properties. Secondly, that zonal flows are an
important ingredient in this effect precisely because the fast ion zonal response is negligible.
Finally, that in the limit of highly-energetic fast ions, their response approaches that of the
‘dilution’ model; in particular, alpha particles are expected to have little, if any, stabilizing
effect on plasma turbulence. We support these conclusions through detailed linear and
nonlinear gyrokinetic simulations. | es |
dc.format | application/pdf | es |
dc.format.extent | 16 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Nuclear Fusion, 58 (8), 1-15. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Turbulence | es |
dc.subject | Fast ions | es |
dc.subject | Stabilization | es |
dc.subject | Microturbulence | es |
dc.subject | Gyrokinetics | es |
dc.subject | Simulation | es |
dc.title | First principles of modelling the stabilization of microturbulence by fast ions | 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.publisherversion | https://doi.org/10.1088/1741-4326/aab727 | es |
dc.identifier.doi | 10.1088/1741-4326/aab727 | 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 | 8 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 15 | es |