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Abstract

H modes with good confinement and small ELMs with the characteristics of type II or grassy ELMs have been observed on ASDEX Upgrade. Such ELM behaviour is essential to minimize erosion of the divertor tiles in any next step device. For the first time, operation with this favourable ELM type could be demonstrated close to the Greenwald density. Even for such high densities, energy confinement times were close to recent H mode scaling.

Additional information

Authors: STOBER J ET AL, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);ASDEX UPGRADE TEAM, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE)
Bibliographic Reference: An article published in: Nuclear Fusion, Vol.41, No.9 (2001), pp.1124-1134
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