| Autor: |
Oya, Yasuhisa, Masuzaki , Suguru, Tokitani, Masayuki, Nakata, Moeko, Sun, Fei, Oyaidzu, Makoto, Isobe, Kanetsuku, Asakura, Nobuyuki, Otsuka, Teppei, Widdowson, Anna, Likonen, Jari, Rubel, Marek, Contributors, JET |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Zdroj: |
Fusion Science and Technology. 76(4):439-445 |
| ISSN: |
1536-1055 |
| Popis: |
Hydrogen isotope retention and chemical state for the tiles exposed to plasma in the JET–ITER-like wall (ILW) during two campaigns in 2011–2012 (first campaign, ILW-1) and 2015–2016 (third campaign, ILW-3) were studied and compared by means of X-ray photoelectron spectroscopy and thermal desorption spectroscopy. In both campaigns the upper part of the inner divertor tiles was the deposition-dominated area, while erosion was observed on the outer divertor tiles. Therefore, higher deuterium retention was found on the inner divertor tiles. The major D desorption peak for the inner divertor tiles from ILW-3 was located at the temperature range of 470°C to 520°C, which was higher than measured after ILW-1: 370°C to 430°C. The XPS analyses showed the formation of a BeO layer on the ILW-3 inner divertor tiles, while after ILW-1 the layers also contained a significant amount of carbon. Deuterium retention was reduced toward the outer divertor tiles. The differences could be related to the difference in the power level in the two campaigns. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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