Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns

J.P. Coad (Corresponding Author), S. Gruenhagen, D.E. Hole, Antti Hakola, Seppo Koivuranta, Jari Likonen, M. Rubel, A. Widdowson, JET-EFDA collaborators

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters
Original languageEnglish
Article number014003
Number of pages6
JournalPhysica Scripta
Issue numberT145
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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Erosion
erosion
tiles
Tile
beryllium
Carbon
Plasma
shutdowns
Limiter
carbon
Impurities
tungsten
impurities

Cite this

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title = "Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns",
abstract = "In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters",
author = "J.P. Coad and S. Gruenhagen and D.E. Hole and Antti Hakola and Seppo Koivuranta and Jari Likonen and M. Rubel and A. Widdowson and {JET-EFDA collaborators}",
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Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns. / Coad, J.P. (Corresponding Author); Gruenhagen, S.; Hole, D.E.; Hakola, Antti; Koivuranta, Seppo; Likonen, Jari; Rubel, M.; Widdowson, A.; JET-EFDA collaborators.

In: Physica Scripta, No. T145, 014003, 2011.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns

AU - Coad, J.P.

AU - Gruenhagen, S.

AU - Hole, D.E.

AU - Hakola, Antti

AU - Koivuranta, Seppo

AU - Likonen, Jari

AU - Rubel, M.

AU - Widdowson, A.

AU - JET-EFDA collaborators

PY - 2011

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AB - In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters

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