dc.creator | Moulton, D. | es |
dc.creator | Corrigan, G. | es |
dc.creator | Harrison, J.R. | es |
dc.creator | Lipschultz, B. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-07-15T13:48:24Z | |
dc.date.available | 2020-07-15T13:48:24Z | |
dc.date.issued | 2018-09 | |
dc.identifier.citation | Moulton, D., Corrigan, G., Harrison, J.R., Lipschultz, B., Jet Contributors, y García Muñoz, M. (2018). Neutral pathways and heat flux widths in vertical- and horizontal-target EDGE2D-EIRENE simulations of JET. Nuclear Fusion, 58 (9), 1-12. | |
dc.identifier.issn | 1741-4326 | es |
dc.identifier.uri | https://hdl.handle.net/11441/99492 | |
dc.description.abstract | This paper further analyses the EDGE2D-EIRENE simulations
presented by [Chankin et al 2017 Nucl. Mater. Energy 12 273], of L-mode
JET plasmas in vertical-vertical (VV) and vertical-horizontal (VH) divertor
configurations. As expected, the simulated outer divertor ionisation source peaks
near the separatrix in VV and radially further out in VH. We identify the
reflections of recycled neutrals from lower divertor tiles as the primary mechanism
by which ionisation is concentrated on the outer divertor separatrix in the VV
configuration. These lower tile reflection pathways (of neutrals from the outer
divertor, and to an even greater extent from the inner divertor) dominate the outer
divertor separatrix ionisation. In contrast, the lower-tile-reflection pathways are
much weaker in the VH simulation and its outer divertor ionisation is dominated
by neutrals which do not reflect from any surfaces. Interestingly, these differences
in neutral pathways give rise to strong differences in the heat flux density width
λq at the outer divertor entrance: λq = 3.2 mm in VH compared to λq = 11.8 mm
in VV. In VH, a narrow channel exists in the near scrape-off-layer (SOL) where
the convected heat flux, driven by strong Er × B flow and thermoelectric current,
dominates over the conducted heat flux. The width of this channel sets λq and is
determined by the radial distance between the separatrix and the ionisation peak
in the outer divertor | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.description.sponsorship | RCUK Energy Programme P012450/1 | 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 (9), 1-12. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | Neutral pathways and heat flux widths in vertical- and horizontal-target EDGE2D-EIRENE simulations of JET | es |
dc.type | info:eu-repo/semantics/article | es |
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 | P012450/1 | es |
dc.relation.publisherversion | https://doi.org/10.1088/1741-4326/aacf0f | es |
dc.identifier.doi | 10.1088/1741-4326/aacf0f | 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 | 9 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 12 | es |