Comparative study regarding the sputtering yield of nanocolumnar tungsten surfaces under Ar+ irradiation

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dc.contributor.author Lopez Cazalilla, Alvaro
dc.contributor.author Cupak, Christian
dc.contributor.author Fellinger, Martina
dc.contributor.author Granberg, Fredric
dc.contributor.author Szabo, Paul S.
dc.contributor.author Mutzke, Andreas
dc.contributor.author Nordlund, Kai
dc.contributor.author Aumayr, Friedrich
dc.contributor.author González-Arrabal, Raquel
dc.date.accessioned 2022-07-19T06:53:15Z
dc.date.available 2022-07-19T06:53:15Z
dc.date.issued 2022-07-14
dc.identifier.citation Lopez Cazalilla , A , Cupak , C , Fellinger , M , Granberg , F , Szabo , P S , Mutzke , A , Nordlund , K , Aumayr , F & González-Arrabal , R 2022 , ' Comparative study regarding the sputtering yield of nanocolumnar tungsten surfaces under Ar+ irradiation ' , Physical Review Materials , vol. 6 , no. 7 , 075402 . https://doi.org/10.1103/PhysRevMaterials.6.075402
dc.identifier.other PURE: 217524470
dc.identifier.other PURE UUID: a7dd3a04-a568-47da-8ba7-c4f27a6e09a1
dc.identifier.other WOS: 000829731700002
dc.identifier.other Scopus: 85135697024
dc.identifier.other ORCID: /0000-0001-6244-1942/work/117943752
dc.identifier.other ORCID: /0000-0002-9365-4294/work/117948222
dc.identifier.other ORCID: /0000-0001-9058-5652/work/117948893
dc.identifier.uri http://hdl.handle.net/10138/346278
dc.description.abstract Nanostructured tungsten has been proposed as a promising option for plasma facing materials in future fusion reactors, because compared to conventional tungsten it shows advantages such as a better radiation resistance and, in particular, a retardation of tungsten-fuzz growth. Besides these aspects, the sputtering yield of nanostructured tungsten under ion bombardment is of interest, since it would affect the atomic density of tungsten emitted into the fusion plasma, which leads to radiative heat losses. In this work, we present a multiscale approach for investigating the sputtering yield of nanocolumnar tungsten surfaces under 1 keV and 2 keV Ar irradiation. Our results cover experiments and also computational simulations, which operate either on the basis of the binary collision approximation and ray tracing or use a full molecular dynamics implementation. In our studied case, both computational approaches can predict the sputtering yield of nanocolumnar tungsten surfaces very well. In comparison to flat W, we observe a much reduced dependence on the ion incidence angle, similar as reported for conventional rough surfaces in literature. However, an additional global reduction of the sputtering yield was identified, which can be attributed to geometrical redeposition effects between the separated nanocolumns. These results support the applicability of nanocolumnar tungsten as a first wall coating. en
dc.format.extent 13
dc.language.iso eng
dc.relation.ispartof Physical Review Materials
dc.rights cc_by_nc
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 114 Physical sciences
dc.title Comparative study regarding the sputtering yield of nanocolumnar tungsten surfaces under Ar+ irradiation en
dc.type Article
dc.contributor.organization Helsinki Institute of Sustainability Science (HELSUS)
dc.contributor.organization Helsinki Institute of Urban and Regional Studies (Urbaria)
dc.contributor.organization Faculty of Science
dc.contributor.organization Department of Physics
dc.contributor.organization Helsinki Institute of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1103/PhysRevMaterials.6.075402
dc.relation.issn 2475-9953
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion
dc.type.version acceptedVersion

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