Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7965451 | Journal of Nuclear Materials | 2015 | 8 Pages |
Abstract
With increasing size of a tokamak device and associated fusion power gain an increasing power flux density towards the divertor needs to be handled. A solution for handling this power flux is crucial for a safe and economic operation. Using purely geometric arguments in an ITER-like divertor this power flux can be reduced by approximately a factor 100. Based on a conservative extrapolation of current technology for an integrated engineering approach to remove power deposited on plasma facing components a further reduction of the power flux density via volumetric processes in the plasma by up to a factor of 50 is required. Our current ability to interpret existing power exhaust scenarios using numerical transport codes is analyzed and an operational scenario as a potential solution for ITER like divertors under high density and highly radiating reactor-relevant conditions is presented. Alternative concepts for risk mitigation as well as strategies for moving forward are outlined.
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Authors
M. Wischmeier, The ASDEX Upgrade team and JET EFDA contributors The ASDEX Upgrade team and JET EFDA contributors,