@misc{oai:repo.qst.go.jp:00066802,
 author = {Oya, Yasuhisa and Masuzaki, Suguru and Tokitani, Masayuki and Azuma, Keisuke and Oyaizu, Makoto and Isobe, Kanetsugu and Asakura, Nobuyuki and M., Widdowson Anna and Heinola, Kalle and Jachmich, Stefan and Rubel, Marek and contributors, JET and 小柳津 誠 and 磯部 兼嗣 and 朝倉 伸幸},
 month = {Sep},
 note = {To understand the fuel retention mechanism, correlation of surface chemical states and hydrogen isotope retention behavior determined by XPS (X-ray photoelectron spectroscopy) and TDS (Thermal desorption spectroscopy), respectively, for JET ITER-Like Wall samples from operational period 2011-2012 were investigated. It was found that the deposition layer was formed on the upper part of the inner vertical divertor area. At the inner plasma strike point region, the original surface materials, W or Mo, were found, indicating to an erosion-dominated region, but deposition of impurities was also found. Higher heat load would induce the formation of metal carbide. At the outer horizontal divertor tile, mixed material layer was formed with iron as an impurity. TDS showed the H and D desorption behavior and the major D desorption temperature for the upper part of the inner vertical tile was located at 370 °C and 530 °C. At the strike point region, the D desorption temperature was clearly shifted toward higher release temperatures, indicating the stabilization of D trapping by higher heat load., 2nd Asia-Pacific Symposium on Tritium science},
 title = {Correlation of surface chemical states with hydrogen isotope retention in divertor tiles of JET with ITER-Like Wall},
 year = {2017}
}