Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry

Y. Hatano, K. Yumizuru, S. Koivuranta, J. Likonen, M. Hara, M. Matsuyama, S. Masuzaki, M. Tokitani, N. Asakura, K. Isobe, T. Hayashi, A. Baron-Wiechec, A. Widdowson, JET contributors

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

Original languageEnglish
Article number014014
JournalPhysica Scripta
Issue numberT170
DOIs
Publication statusPublished - 1 Dec 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

tiles
Tile
tritium
Penetration
Half line
rays
penetration
spectroscopy
x rays
Joint European Torus
Implantation
Energy Spectrum
High Energy
micrometers
implantation
Torus
Fusion
tungsten
energy spectra
fusion

Keywords

  • nuclear fusion
  • tritium
  • divertor
  • retention
  • tungsten
  • implantation
  • Joint European Torus

Cite this

Hatano, Y. ; Yumizuru, K. ; Koivuranta, S. ; Likonen, J. ; Hara, M. ; Matsuyama, M. ; Masuzaki, S. ; Tokitani, M. ; Asakura, N. ; Isobe, K. ; Hayashi, T. ; Baron-Wiechec, A. ; Widdowson, A. ; contributors, JET. / Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry. In: Physica Scripta. 2017 ; No. T170.
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abstract = "Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.",
keywords = "nuclear fusion, tritium, divertor, retention, tungsten, implantation, Joint European Torus",
author = "Y. Hatano and K. Yumizuru and S. Koivuranta and J. Likonen and M. Hara and M. Matsuyama and S. Masuzaki and M. Tokitani and N. Asakura and K. Isobe and T. Hayashi and A. Baron-Wiechec and A. Widdowson and JET contributors",
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doi = "10.1088/1402-4896/aa8931",
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Hatano, Y, Yumizuru, K, Koivuranta, S, Likonen, J, Hara, M, Matsuyama, M, Masuzaki, S, Tokitani, M, Asakura, N, Isobe, K, Hayashi, T, Baron-Wiechec, A, Widdowson, A & contributors, JET 2017, 'Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry', Physica Scripta, no. T170, 014014. https://doi.org/10.1088/1402-4896/aa8931

Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry. / Hatano, Y.; Yumizuru, K.; Koivuranta, S.; Likonen, J.; Hara, M.; Matsuyama, M.; Masuzaki, S.; Tokitani, M.; Asakura, N.; Isobe, K.; Hayashi, T.; Baron-Wiechec, A.; Widdowson, A.; contributors, JET.

In: Physica Scripta, No. T170, 014014, 01.12.2017.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry

AU - Hatano, Y.

AU - Yumizuru, K.

AU - Koivuranta, S.

AU - Likonen, J.

AU - Hara, M.

AU - Matsuyama, M.

AU - Masuzaki, S.

AU - Tokitani, M.

AU - Asakura, N.

AU - Isobe, K.

AU - Hayashi, T.

AU - Baron-Wiechec, A.

AU - Widdowson, A.

AU - contributors, JET

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

AB - Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

KW - nuclear fusion

KW - tritium

KW - divertor

KW - retention

KW - tungsten

KW - implantation

KW - Joint European Torus

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M3 - Article

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JF - Physica Scripta

SN - 0031-8949

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