Tritium distributions on tungsten and carbon tiles used in the JET divertor

Y. Hatano, K. Yumizuru, J. Likonen, S. Koivuranta, J. Ikonen

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.
Original languageEnglish
Number of pages5
JournalPhysica Scripta
Volume2016
Issue numberT167
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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tiles
Tile
tritium
Carbon
tungsten
carbon
Luminescence
luminescence
Imaging
Impurities
Oxygen
Directly proportional
impurities
oxygen

Keywords

  • beryllium
  • fusion reactors
  • materials
  • plasma facing materials
  • tritium
  • tungsten

Cite this

@article{8899463a9b874927ac83d31e22d6659d,
title = "Tritium distributions on tungsten and carbon tiles used in the JET divertor",
abstract = "Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.",
keywords = "beryllium, fusion reactors, materials, plasma facing materials, tritium, tungsten",
author = "Y. Hatano and K. Yumizuru and J. Likonen and S. Koivuranta and J. Ikonen",
year = "2016",
doi = "10.1088/0031-8949/T167/1/014009",
language = "English",
volume = "2016",
journal = "Physica Scripta",
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publisher = "Institute of Physics IOP",
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Tritium distributions on tungsten and carbon tiles used in the JET divertor. / Hatano, Y.; Yumizuru, K.; Likonen, J.; Koivuranta, S.; Ikonen, J.

In: Physica Scripta, Vol. 2016, No. T167, 2016.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tritium distributions on tungsten and carbon tiles used in the JET divertor

AU - Hatano, Y.

AU - Yumizuru, K.

AU - Likonen, J.

AU - Koivuranta, S.

AU - Ikonen, J.

PY - 2016

Y1 - 2016

N2 - Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.

AB - Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.

KW - beryllium

KW - fusion reactors

KW - materials

KW - plasma facing materials

KW - tritium

KW - tungsten

U2 - 10.1088/0031-8949/T167/1/014009

DO - 10.1088/0031-8949/T167/1/014009

M3 - Article

VL - 2016

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

IS - T167

ER -