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 |
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Article number | 014014 |
Journal | Physica Scripta T |
Volume | 2017 |
Issue number | T170 |
DOIs | |
State | Published - 2017/12/01 |
Event | 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 - Neuss/Dusseldorf, Germany Duration: 2017/05/16 → 2017/05/19 |
Keywords
- Joint European Torus
- divertor
- implantation
- nuclear fusion
- retention
- tritium
- tungsten
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics
- General Physics and Astronomy