Integrated modelling of core and SOL/divertor transports

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

In the integrated divertor code (SONIC), the particle and heat fluxes at the core edge are fixed at the given values as input parameters. However, these fluxes should be essentially determined by the plasma transport at the core edge. On the other hand, the SOL/divertor plasma has a strong effect on the core edge plasma through the particle source, the charge exchange loss and the impurity radiation. In order to study the divertor characteristics including such interactions, SONIC should be consistently coupled to a tokamak transport code. This project has started under the framework of Burning Plasma Simulation Initiative (BPSI) in Japan. On such code integration, it is serious problems that each code has been developed independently by different researcher and that integration must be performed with code improvement. We have developed a new MPMD (Multiple Program Multiple Data) computing system to solve such problems.