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Divertor Concepts II: The Dynamic Ergodic Divertor

K. H. Finken

Fusion Science and Technology

Volume 45 / Number 2T / March 2004 / Pages 256-260


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The Dynamic Ergodic Divertor (DED) has recently been taken into operation on the TEXTOR tokamak. One of the aims is the study of the mitigation of the heat flux by rotating the divertor strike points. After an introduction into the theory of ergodization, the design of the DED is presented. The Chirikov parameter describing the level of ergodization reaches a level of up to four if the perturbation current is applied in an optimized way. Finally the rich physics options of the DED are discussed.

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