Author/Authors :
Grigull، نويسنده , , P. and McCormick، نويسنده , , K. and Feng، نويسنده , , Y. and Werner، نويسنده , , A. van Brakel، نويسنده , , R. and Ehmler، نويسنده , , H. and Gadelmeier، نويسنده , , J. Eades and F. J. Hartmann، نويسنده , , D. and Hildebrandt، نويسنده , , D. and Jaenicke، نويسنده , , R. and Kisslinger، نويسنده , , J. and Klinger، نويسنده , , T. and Kِnig، نويسنده , , R. and Naujoks، نويسنده , , D. and Niedermeyer، نويسنده , , H. and Ramas، نويسنده ,
Abstract :
The new island divertor in W7-AS enables quasi steady-state operation with NBI at very high density including scenarios with stable detachment from the targets. Experiments with reversed B-field indicate that the interaction zones on the targets are affected in first order by E×B drifts. Stable detachment is restricted to magnetic field configurations with sufficiently large separation between x-points and targets and not too small field line pitch inside the islands. It is always partial in the sense that it does not extend over the full target area. This inhomogeneity is ascribed to an in/out asymmetry of the electron temperature at the upstream separatrix position.
