@misc{oai:repo.qst.go.jp:00072758, author = {Ashikawa, Naoko and Asakura, Nobuyuki and Oyaizu, Makoto and Isobe, Kanetsugu and Widdowson, A. and Grzonka, J. and Rubel, M. and Hara, M. and Ohtsuka, T. and Hamaguchi, Dai and Kurotaki, Hironori and Nakano, Suguru and Kim, Jaehwan and Miyamoto, M. and Hatano, Y. and Sakamoto, R. and Heinola, K. and Baron-Wiechec, A. and Tanigawa, Hiroyasu and Nakamichi, Masaru and Yamanishi, Toshihiko and 朝倉 伸幸 and 小柳津 誠 and 磯部 兼嗣 and 濱口 大 and 黒滝 宏紀 and 中野 優 and 金 宰煥 and 谷川 博康 and 中道 勝 and 山西 敏彦}, month = {Oct}, note = {A comprehensive analysis of collected dust particles in the Joint European Torus ITER-like Wall (JET-ILW) after the first campaign in 2011-2012[1] has been carried out at the International Fusion Energy Research Centre (IFERC) in order to identify dust characteristics such as structures, material components and hydrogen isotope retention. Analysis of the cross-section structure as well as surface one began with from a large-size dust particle (~100 m). For the flake-type beryllium (Be)-based dust, it was found that the damaged Be crystal structure contained a larger oxygen component near the surface (~2 m). The specific dust flake of beryllium oxide in the experiment device was shown for the first time. Deuterium retention in small weight of dust particles (4.4 mg) was evaluated to be 1.2 x 1021 atoms/g by TDS, which estimated to be 8.2 x 1020 atoms for entire dust particles collected from the inner divertor (0.7 g). This result firstly suggests that a contribution of dust particles to the total retention in the experiment was small, i.e. less than 1% of the total retention in deposition layers of the inner divertor target., 26th IAEA Fusion Energy Conference}, title = {Comprehensive Analysis of Metal Dust Particles in JET-ILW, and Impact on Fusion Reactor}, year = {2016} }