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Surface composition and structure of divertor tiles following the JET tokamak operation with the ITER-like wall

A. Lagoyannis, P. Tsavalas, K. Mergia, G. Provatas, K. Triantou, E. Tsompopoulou, M. Rubel, P. Petersson, A. Widdowson, S. Harissopulos2017年被引用 14Nuclear FusionIF 3出版社

Samples extracted from several divertor tiles following the 2011–2012 operation of JET with the ITER-Like wall were analyzed using ion beam analysis methods, x-ray fluorescence spectroscopy, scanning electron microscopy with energy dispersive spectroscopy analysis and x-ray diffraction. The emphasis was on the determination of light species and on material mixing including compound formation on the bottom and the outer divertor tiles. Deposition of deuterium, beryllium, carbon, nitrogen, oxygen, iron, chromium, nickel and molybdenum has been detected on all studied tiles. The thickest deposition, of around 4 µm, was measured on the bottom of the outer divertor, whereas the other surfaces (inner bottom and vertical outer) the co-deposits were around 1 µm. x-ray diffraction measurements have revealed the formation of the compound W2C on all specimens.

日本語訳

2011年から2012年にかけてのITER類似壁を備えたJETの運転後、複数のダイバータタイルから採取された試料を、イオンビーム分析、X線蛍光分析、エネルギー分散型X線分光法を備えた走査型電子顕微鏡、およびX線回折を用いて分析した。分析の焦点は、底部および外側ダイバータタイルにおける軽元素種の定量と、材料混合(化合物形成を含む)の解明に置かれた。すべての調査対象タイルにおいて、重水素、ベリリウム、炭素、窒素、酸素、鉄、クロム、ニッケル、モリブデンの堆積が検出された。最も厚い堆積層は外側ダイバータ底部で測定され、その厚さは約4 µmであった。一方、内側底部および垂直外側の各表面では、共堆積層の厚さは約1 µmであった。X線回折測定により、すべての試料において化合物W2Cの形成が明らかになった。

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iter高精度(タイトル一致)jet高精度(タイトル一致)

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ITERJETDivertorITER-like wall
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