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Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D...

Publication Type
Conference Paper
Journal Name
Journal of Nuclear Materials
Publication Date
Page Numbers
901 to 905
Volume
415
Issue
1
Conference Name
19th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI)
Conference Location
San Diego, California, United States of America
Conference Date
-

As shown on DIII-D edge localized modes (ELMs) can be either completely eliminated or mitigated with resonant magnetic perturbation (RMP) fields. Two infrared cameras, separated 105 degrees toroidally, were used to make simultaneous measurements of ELM heat loads with high frame rates. Without the RMP fields ELMs display a variety of different heat load dynamics and a range of toroidal variability that is characteristic of their 3D structure. Comparing radial averages there is no asymmetry between two toroidal locations. With RMP-mitigated ELMs, the variability in the radially averaged power loads is significantly reduced and toroidal asymmetries in power loads are introduced. In addition to RMP ELM suppression scenarios an RMP scenario with only very small ELMs and very good confinement has been achieved. (C) 2010 Published by Elsevier B.V.