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Miki, Kazuhiro
no journal, ,
A central issue in H-mode physics is to achieve control, not only understanding. Control of the L-H transition is desirable, on account of the successful fusion power plants. We here report on model studies of stimulated L-H transitions. We have developed a one-dimensional mesoscale model. Numerical studies reveal that L-H transitions can be triggered by particle injection into a subcritical state. Particle injection alters the edge mean flow shear. For low ambient heating, strong injection is predicted to trigger a transient turbulence collapse. We predict that repetitive injection at a period less than the lifetime of the collapsed state can thus maintain the turbulence collapse and so sustain a driven H-mode-like state. We also observe that zonal flows do not play a critical role in stimulated transitions.
Matsuyama, Akinobu; Yagi, Masatoshi; Kagei, Yasuhiro
no journal, ,
no abstracts in English
Shiraishi, Junya; Aiba, Nobuyuki; Miyato, Naoaki; Yagi, Masatoshi
no journal, ,
no abstracts in English
Yagi, Masatoshi; Matsuyama, Akinobu; Miyato, Naoaki; Takizuka, Tomonori*
no journal, ,
Maeyama, Shinya; Ishizawa, Akihiro*; Watanabe, Tomohiko*; Nakata, Motoki; Idomura, Yasuhiro
no journal, ,
Narita, Emi; Honda, Mitsuru; Hayashi, Nobuhiko; Urano, Hajime; Ide, Shunsuke; Fukuda, Takeshi*
no journal, ,
no abstracts in English