Author/Authors :
Morisaki، نويسنده , , T. and Masuzaki، نويسنده , , S. and Komori، نويسنده , , A. and Ohyabu، نويسنده , , N. and Kobayashi، نويسنده , , M. and Feng، نويسنده , , Y. and Sardei، نويسنده , , F. and Narihara، نويسنده , , K. and Tanaka، نويسنده , , K. and Ida، نويسنده , , K. and Peterson، نويسنده , , B.J. and Yoshinuma، نويسنده , , M. and Ashikawa، نويسنده , , N. and Emoto، نويسنده , , M. and Funaba، نويسنده , , H. and Goto، نويسنده , , M. and Ikeda، نويسنده ,
Abstract :
A local island divertor (LID) experiment has begun on LHD, with the aims of controlling edge recycling and improving the plasma confinement. The fundamental divertor functions of the LID have been demonstrated in the recent experiments. From the particle flux profile measurements on the LID head it was found that the particles diffusing out from the core region are well guided along the island separatrix to the LID head. Owing to the closed configuration around the LID head, evidence of the high efficient pumping was observed, together with a strong capacity to screen impurities. The first results of edge modeling using the EMC3-EIRENE code are also presented.
Keywords :
Impurity screening , LHD , Edge modeling , Island divertor , Edge plasma
