Change of divertor characteristics after H-mode transition

Shimizu, Katsuhiro; Takizuka, Tomonori; Hoshino, Kazuo; Honda, Mitsuru; Hayashi, Nobuhiko; Takayama, Arimichi*; Fukuyama, Atsushi*; Yagi, Masatoshi*

The establishment of impurity control is indispensable to achieve the fusion reactors. For such purpose, we have developed the modelling of impurity generation and transport, and carried out the simulation study on divertor transport. Such divertor simulations have been performed by giving the boundary condition of particle and heat fluxes at a certain magnetic surface in the core plasma near the separatrix. Since the core confinement and the SOL-divertor characteristics are significantly affected each other, above core boundary condition could not simply be given as input parameters. In this paper, we have developed the self-consistent integrated modelling of 1D core transport (TOPICS-IB) and 2D SOL/divertor transport (SONIC). Dynamic change in particle and heat fluxes into the SOL region after an H-mode of JT-60SA transition has been studied. We also discuss about the temporal heat flux onto the divertor plates after an ELM crash.