Material migration patterns and overview of first surface analysis of the JET ITER-like wall

A A Widdowson (Corresponding Author), E. Alves, C.F. Ayres, A. Baron-Wiechec, S. Brezinsek, N. Catarino, J.P. Coad, K. Heinola, Jari Likonen, G.F. Matthews, M. Rubel, JET-EFDA contributors

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Abstract

Following the first JET ITER-like wall operations a detailed in situ photographic survey of the main chamber and divertor was completed. In addition, a selection of tiles and passive diagnostics were removed from the vessel and made available for post mortem analysis. From the photographic survey and results from initial analysis, the first conclusions regarding erosion, deposition, fuel retention and material transport during divertor and limiter phases have been drawn. The rate of deposition on inner and outer base divertor tiles and remote divertor corners was more than an order of magnitude less than during the preceding carbon wall operations, as was the concomitant deuterium retention. There was however beryllium deposition at the top of the inner divertor. The net beryllium erosion rate from the mid-plane inner limiters was found to be higher than for the previous carbon wall campaign although further analysis is required to determine the overall material balance due to erosion and re-deposition.
Original languageEnglish
Article number014010
Number of pages9
JournalPhysica Scripta
Volume2014
Issue numberT159
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

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Migration
Erosion
Limiter
erosion
Tile
tiles
Carbon
beryllium
material balance
Vessel
carbon
Diagnostics
vessels
deuterium
chambers

Cite this

A Widdowson, A., Alves, E., Ayres, C. F., Baron-Wiechec, A., Brezinsek, S., Catarino, N., ... contributors, JET-EFDA. (2014). Material migration patterns and overview of first surface analysis of the JET ITER-like wall. Physica Scripta, 2014(T159), [014010]. https://doi.org/10.1088/0031-8949/2014/T159/014010
A Widdowson, A ; Alves, E. ; Ayres, C.F. ; Baron-Wiechec, A. ; Brezinsek, S. ; Catarino, N. ; Coad, J.P. ; Heinola, K. ; Likonen, Jari ; Matthews, G.F. ; Rubel, M. ; contributors, JET-EFDA. / Material migration patterns and overview of first surface analysis of the JET ITER-like wall. In: Physica Scripta. 2014 ; Vol. 2014, No. T159.
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abstract = "Following the first JET ITER-like wall operations a detailed in situ photographic survey of the main chamber and divertor was completed. In addition, a selection of tiles and passive diagnostics were removed from the vessel and made available for post mortem analysis. From the photographic survey and results from initial analysis, the first conclusions regarding erosion, deposition, fuel retention and material transport during divertor and limiter phases have been drawn. The rate of deposition on inner and outer base divertor tiles and remote divertor corners was more than an order of magnitude less than during the preceding carbon wall operations, as was the concomitant deuterium retention. There was however beryllium deposition at the top of the inner divertor. The net beryllium erosion rate from the mid-plane inner limiters was found to be higher than for the previous carbon wall campaign although further analysis is required to determine the overall material balance due to erosion and re-deposition.",
author = "{A Widdowson}, A and E. Alves and C.F. Ayres and A. Baron-Wiechec and S. Brezinsek and N. Catarino and J.P. Coad and K. Heinola and Jari Likonen and G.F. Matthews and M. Rubel and JET-EFDA contributors",
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A Widdowson, A, Alves, E, Ayres, CF, Baron-Wiechec, A, Brezinsek, S, Catarino, N, Coad, JP, Heinola, K, Likonen, J, Matthews, GF, Rubel, M & contributors, JET-EFDA 2014, 'Material migration patterns and overview of first surface analysis of the JET ITER-like wall', Physica Scripta, vol. 2014, no. T159, 014010. https://doi.org/10.1088/0031-8949/2014/T159/014010

Material migration patterns and overview of first surface analysis of the JET ITER-like wall. / A Widdowson, A (Corresponding Author); Alves, E.; Ayres, C.F.; Baron-Wiechec, A.; Brezinsek, S.; Catarino, N.; Coad, J.P.; Heinola, K.; Likonen, Jari; Matthews, G.F.; Rubel, M.; contributors, JET-EFDA.

In: Physica Scripta, Vol. 2014, No. T159, 014010, 2014.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Material migration patterns and overview of first surface analysis of the JET ITER-like wall

AU - A Widdowson, A

AU - Alves, E.

AU - Ayres, C.F.

AU - Baron-Wiechec, A.

AU - Brezinsek, S.

AU - Catarino, N.

AU - Coad, J.P.

AU - Heinola, K.

AU - Likonen, Jari

AU - Matthews, G.F.

AU - Rubel, M.

AU - contributors, JET-EFDA

PY - 2014

Y1 - 2014

N2 - Following the first JET ITER-like wall operations a detailed in situ photographic survey of the main chamber and divertor was completed. In addition, a selection of tiles and passive diagnostics were removed from the vessel and made available for post mortem analysis. From the photographic survey and results from initial analysis, the first conclusions regarding erosion, deposition, fuel retention and material transport during divertor and limiter phases have been drawn. The rate of deposition on inner and outer base divertor tiles and remote divertor corners was more than an order of magnitude less than during the preceding carbon wall operations, as was the concomitant deuterium retention. There was however beryllium deposition at the top of the inner divertor. The net beryllium erosion rate from the mid-plane inner limiters was found to be higher than for the previous carbon wall campaign although further analysis is required to determine the overall material balance due to erosion and re-deposition.

AB - Following the first JET ITER-like wall operations a detailed in situ photographic survey of the main chamber and divertor was completed. In addition, a selection of tiles and passive diagnostics were removed from the vessel and made available for post mortem analysis. From the photographic survey and results from initial analysis, the first conclusions regarding erosion, deposition, fuel retention and material transport during divertor and limiter phases have been drawn. The rate of deposition on inner and outer base divertor tiles and remote divertor corners was more than an order of magnitude less than during the preceding carbon wall operations, as was the concomitant deuterium retention. There was however beryllium deposition at the top of the inner divertor. The net beryllium erosion rate from the mid-plane inner limiters was found to be higher than for the previous carbon wall campaign although further analysis is required to determine the overall material balance due to erosion and re-deposition.

U2 - 10.1088/0031-8949/2014/T159/014010

DO - 10.1088/0031-8949/2014/T159/014010

M3 - Article

VL - 2014

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

IS - T159

M1 - 014010

ER -

A Widdowson A, Alves E, Ayres CF, Baron-Wiechec A, Brezinsek S, Catarino N et al. Material migration patterns and overview of first surface analysis of the JET ITER-like wall. Physica Scripta. 2014;2014(T159). 014010. https://doi.org/10.1088/0031-8949/2014/T159/014010