@article{oai:repo.qst.go.jp:00049545,
 author = {ビアワーゲ, アンドレアス and 篠原, 孝司 and 藤堂, 泰 and 相羽, 信行 and 石川, 正男 and 松永, 剛 and 武智, 学 and 矢木, 雅敏 and ビアワーゲ アンドレアス and 篠原 孝司 and 藤堂 泰 and 相羽 信行 and 石川 正男 and 松永 剛 and 武智 学 and 矢木 雅敏},
 journal = {Nature Communications},
 month = {Aug},
 note = {In the late 1990s, fusion scientists at the Japanese tokamak JT-60U discovered abrupt large-amplitude events during beam-driven deuterium plasma experiments. A large spike in the magnetic fluctuation signal followed by a drop in the neutron emission rate indicates that energetic ions abruptly migrate out of the plasma core during an intense burst of Alfvén waves that lasts only 0.3 ms. With continued beam injection, the energetic ion population recovers until the next event occurs 40–60 ms later. Here we present results from simulations that successfully reproduce multiple migration cycles and report numerical and experimental evidence for the multi-mode nature of these intermittent phenomena. Moreover, we elucidate the role of collisional slow-down and show that the large-amplitude Alfvénic fluctuations can drive magnetic reconnection and induce macroscopic magnetic islands. In this way, our simulations allow us to gradually unravel the underlying physical processes and develop predictive capabilities.},
 pages = {3282-1--3282-11},
 title = {Simulations tackle abrupt massive migrations of energetic beam ions in a tokamak plasma},
 volume = {9},
 year = {2018}
}