Preliminary study of the influence of DED on carbon radiation and transport in the TEXTOR tokamak

JOURNAL OF NUCLEAR MATERIALS

卷:337

Article; Proceedings Paper

Telesea, G ; Crombé, K ; Tokar, M ; Unterberg, B ; Verdoolaege, G ; Zagorski, R ; Van Oost, G

关键词: carbon impurity;    impurity screening;    spectroscopy;    stochastic boundary;    TEXTOR;   

DOI  :  10.1016/j.jnucmat.2004.10.108

来源: Elsevier

【 摘 要 】

Changes on transport and radiation properties of intrinsic carbon under the influence of the Dynamic Ergodic Divertor depend on the modal composition of the induced error field. For 12/4 mode operation, significant carbon screening is not observed up to half of the nominal DED maximum current achieved so far. On the contrary, for 3/1 DED operation the very efficient mechanism of expulsion of highly ionized carbon ions, observed to occur locally at the foot prints of the 3/1 helical structure and explained in terms of frictional forces, leads to a global carbon decontamination of the central plasma. This result has been established using a new multi-chord diagnostic, which allows to distinguish global from local carbon behavior. (c) 2004 Elsevier B.V. All rights reserved.

【 授权许可】

Free