Snowflake divertor experiments on TCV

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.


Published in:
Plasma Physics and Controlled Fusion, 52, 12, 124010
Presented at:
37th European Physical Society Conference on Plasma Physics, Dublin, Ireland, June 22-25, 2010
Year:
2010
Publisher:
Institute of Physics
ISSN:
0741-3335
Keywords:
Laboratories:
SPC
CRPP




 Record created 2011-04-15, last modified 2018-01-28


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