Abstract
The JT-60U divertor research program is designed to address key issues for the boundary plasma of future tokamaks. The work is organized into five key areas of activity. These research areas include: (1) heat and particle exhaust in the divertor and particle confinement in the main plasma, (2) formation of a radiative divertor and impurity production processes, (3) disruption and its effects, (4) development of theoretical and computer models to predict the operational parameters of future machines, and (5) the conceptual design study of a new radiative pump divertor. The divertor and scrape-off layer (SOL) play a crucial role in establishing the overall performance capabilities of the tokamak. In particular, the formation of stable radiative divertor is one of the most critical issues to develop the concept as a method to reduce and control heat flux to the divertor target. This paper highlights the recent major results from the divertor and boundary physics research in JT-60U.
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