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Elemental and topographical imaging of microscopic variations in deposition on NSTX-U and DIII-D samples

Author(s): Skinner, C.H.; Chrobak, C.P.; Jaworski, M.A.; Kaita, R.; Koel, Bruce E.

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dc.contributor.authorSkinner, C.H.-
dc.contributor.authorChrobak, C.P.-
dc.contributor.authorJaworski, M.A.-
dc.contributor.authorKaita, R.-
dc.contributor.authorKoel, Bruce E.-
dc.date.accessioned2020-01-30T21:28:20Z-
dc.date.available2020-01-30T21:28:20Z-
dc.date.issued2019en_US
dc.identifier.citationSkinner, CH, Chrobak, CP, Jaworski, MA, Kaita, R, Koel, BE. (2019). Elemental and topographical imaging of microscopic variations in deposition on NSTX-U and DIII-D samples. Nuclear Materials and Energy, 18 (35 - 40). doi:10.1016/j.nme.2018.12.001en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1xv1x-
dc.description.abstractTokamak plasma facing components have surface roughness that can cause microscopic spatial variations in erosion and deposition and hence influence material migration, erosion lifetime, dust and tritium accumulation, and plasma contamination. However, high spatial resolution measurements of deposition on a sub-µm scale of surface roughness have been lacking to date. We will present elemental images of graphite samples from NSTX-U and DIII-D DiMES experiments performed with a Scanning Auger Microprobe at sub-micron resolution that show strong microscopic variations in deposition and correlate this with 3D topographical maps of surface irregularities. The NSTX-U samples were boronized and exposed to deuterium plasmas. The DiMES samples had localized Al and W films and were exposed to dedicated helium plasmas. Topographical maps of the samples were performed with a 3D confocal optical microscope and compared to the elemental deposition pattern. The results revealed localized deposition concentrated in areas shadowed from the ion flux, incident in a direction calculated by taking account of the magnetic sheath.en_US
dc.format.extent35 - 40en_US
dc.language.isoen_USen_US
dc.relation.ispartofNuclear Materials and Energyen_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleElemental and topographical imaging of microscopic variations in deposition on NSTX-U and DIII-D samplesen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1016/j.nme.2018.12.001-
dc.date.eissued2018-12-07en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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