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; Seppo Koivuranta; Jari Likonen; M. Hara; M. Matsuyama; S. Masuzaki; M. Tokitani; N. Asakura; K. Isobe; T. Hayashi; A. Baron-Wiechec; A. Widdowson; JET Contributors

doi: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

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

University of Toyama
National Institute for Fusion Science
National Institutes for Quantum and Radiological Science and Technology (QST)
Culham Science Centre

Research output: Contribution to journal › Article › Scientific › peer-review

10 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 language	English
Article number	014014
Journal	Physica Scripta
Issue number	T170
DOIs	https://doi.org/10.1088/1402-4896/aa8931
Publication status	Published - 1 Dec 2017
MoE publication type	A1 Journal article-refereed

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The study was supported by JSPS KAKENHI Grant No. 26289353, the ITER Broader Approach Activities, and the National Institute for Fusion Research (NIFS) as a part of PWI Collaboration.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

nuclear fusion
tritium
divertor
retention
tungsten
implantation
Joint European Torus

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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., & JET Contributors (2017). Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry. Physica Scripta, (T170), Article 014014. https://doi.org/10.1088/1402-4896/aa8931

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title = "Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of {\ss}-ray induced x-ray spectrometry",

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 Seppo Koivuranta and Jari 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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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 & JET Contributors 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

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, Seppo

AU - Likonen, Jari

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 - JET Contributors

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

UR - https://www.scopus.com/pages/publications/85030863791

U2 - 10.1088/1402-4896/aa8931

DO - 10.1088/1402-4896/aa8931

M3 - Article

SN - 0031-8949

JO - Physica Scripta

JF - Physica Scripta

IS - T170

M1 - 014014

ER -

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

Abstract

Funding

UN SDGs

Keywords

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