Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall

Rotating collectors and quartz microbalances (QMBs) are used in JET to provide time-dependent measurements of erosion and deposition. Rotation of collector discs behind apertures allows recording of the long term evolution of deposition. QMBs measure mass change via the frequency deviations of vibra...

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Autores: Beal, J., Widdowson, A., Heinola, K., Baron-Wiechec, A., Gibson, K.J., Jet Contributors, García Muñoz, Manuel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/100502
Acceso en línea:https://hdl.handle.net/11441/100502
https://doi.org/10.1088/0031-8949/T167/1/014052
Access Level:acceso abierto
Palabra clave:Tokamak
JET
Erosion
Deposition
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repository_id_str
spelling Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wallBeal, J.Widdowson, A.Heinola, K.Baron-Wiechec, A.Gibson, K.J.Jet ContributorsGarcía Muñoz, ManuelTokamakJETErosionDepositionRotating collectors and quartz microbalances (QMBs) are used in JET to provide time-dependent measurements of erosion and deposition. Rotation of collector discs behind apertures allows recording of the long term evolution of deposition. QMBs measure mass change via the frequency deviations of vibrating quartz crystals. These diagnostics are used to investigate erosion/deposition during JET-C carbon operation and JET-ILW (ITER-like wall) beryllium/ tungsten operation. A simple geometrical model utilising experimental data is used to model the time-dependent collector deposition profiles, demonstrating good qualitative agreement with experimental results. Overall, the JET-ILW collector deposition is reduced by an order of magnitude relative to JET-C, with beryllium replacing carbon as the dominant deposit. However, contrary to JET-C, in JET-ILW there is more deposition on the outer collector than the inner. This reversal of deposition asymmetry is investigated using an analysis of QMB data and is attributed to the different chemical properties of carbon and beryllium.EURATOM 633053IOP PublishingFísica Atómica, Molecular y NuclearRNM138: Física Nuclear Aplicada2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/100502https://doi.org/10.1088/0031-8949/T167/1/014052reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésPhysica Scripta, 167, 014052-.633053http://dx.doi.org/10.1088/0031-8949/T167/1/014052info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1005022026-06-17T12:51:07Z
dc.title.none.fl_str_mv Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
title Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
spellingShingle Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
Beal, J.
Tokamak
JET
Erosion
Deposition
title_short Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
title_full Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
title_fullStr Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
title_full_unstemmed Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
title_sort Deposition in the inner and outer corners of the JET divertor with carbon wall and metallic ITER-like wall
dc.creator.none.fl_str_mv Beal, J.
Widdowson, A.
Heinola, K.
Baron-Wiechec, A.
Gibson, K.J.
Jet Contributors
García Muñoz, Manuel
author Beal, J.
author_facet Beal, J.
Widdowson, A.
Heinola, K.
Baron-Wiechec, A.
Gibson, K.J.
Jet Contributors
García Muñoz, Manuel
author_role author
author2 Widdowson, A.
Heinola, K.
Baron-Wiechec, A.
Gibson, K.J.
Jet Contributors
García Muñoz, Manuel
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Física Atómica, Molecular y Nuclear
RNM138: Física Nuclear Aplicada
dc.subject.none.fl_str_mv Tokamak
JET
Erosion
Deposition
topic Tokamak
JET
Erosion
Deposition
description Rotating collectors and quartz microbalances (QMBs) are used in JET to provide time-dependent measurements of erosion and deposition. Rotation of collector discs behind apertures allows recording of the long term evolution of deposition. QMBs measure mass change via the frequency deviations of vibrating quartz crystals. These diagnostics are used to investigate erosion/deposition during JET-C carbon operation and JET-ILW (ITER-like wall) beryllium/ tungsten operation. A simple geometrical model utilising experimental data is used to model the time-dependent collector deposition profiles, demonstrating good qualitative agreement with experimental results. Overall, the JET-ILW collector deposition is reduced by an order of magnitude relative to JET-C, with beryllium replacing carbon as the dominant deposit. However, contrary to JET-C, in JET-ILW there is more deposition on the outer collector than the inner. This reversal of deposition asymmetry is investigated using an analysis of QMB data and is attributed to the different chemical properties of carbon and beryllium.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/100502
https://doi.org/10.1088/0031-8949/T167/1/014052
url https://hdl.handle.net/11441/100502
https://doi.org/10.1088/0031-8949/T167/1/014052
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physica Scripta, 167, 014052-.
633053
http://dx.doi.org/10.1088/0031-8949/T167/1/014052
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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