Author/Authors :
Telesca، نويسنده , , G. and Delabie، نويسنده , , E. and Schmitz، نويسنده , , O. and Brezinsek، نويسنده , , S. and Finken، نويسنده , , K.H. and Hellermann، نويسنده , , M. von and Jakubowski، نويسنده , , M. and Lehnen، نويسنده , , M. and Liang، نويسنده , , Y. and Pospieszczyk، نويسنده , , A. and Samm، نويسنده , , U. and Tokar، نويسنده , , M. and Unterberg، نويسنده , , B. and Van Oost، نويسنده , , G.، نويسنده ,
Abstract :
For given conditions, significant change in main particle and carbon transport is observed in TEXTOR under the action of the Dynamic Ergodic Divertor, DED, operating both in 6/2 and 3/1 basic modes. In particular, the stochastic layer created at the plasma edge by the applied perturbing field, is responsible for the so called pump out, PO, effect (observed in DIII-D and on JET during experiments of ELM mitigation) characterized by a decrease in the plasma density and the reduction in the intrinsic carbon concentration in the plasma core. For a sufficiently high value of the applied field strength, in DED 3/1 basic operational mode a 3/1 island connects to the wall, with related further enhancement of particle transport. With respect to carbon, this phenomenon simply leads to a further carbon de-contamination from the central plasma.
