Journal
PLASMA PHYSICS AND CONTROLLED FUSION
Volume 54, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0741-3335/54/12/124050
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Funding
- US DoE by LLNL [DE-AC52-07NA27344]
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This paper summarizes recent progress in the theory of a snowflake divertor, a possible path to reduce both steady-state and intermittent heat loads on the divertor plates to an acceptable level. The most important feature of a SF divertor is the presence of a large zone of a very weak poloidal magnetic field around the poloidal field (PF) null. Qualitative explanation of a variety of new features characteristic of a SF divertor is provided based on simple scaling relations. The main part of the paper is focused on the concept of spreading of the heat flux by curvature-driven convection near the PF null. References to experimental results from the NSTX and TCV tokamaks are provided.
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