Journal
PLASMA PHYSICS AND CONTROLLED FUSION
Volume 52, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0741-3335/52/12/124010
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An ELMy H-mode 'snowflake' (SF) divertor is established and studied for the first time in the TCV tokamak. The H-mode access and the edge localized mode (ELM) dynamics are compared with a conventional single-null diverted configuration. The SF configuration exhibits 15% higher confinement and 2-3 times lower ELM frequency. Ideal MHD stability analysis suggests enhanced stability of the SF H-mode pedestal to mid- to high-toroidal-mode-number modes. The capability of the SF to redistribute the edge power on the additional strike points has been confirmed experimentally.
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