Quasi-coherent fluctuations limiting the pedestal growth on Alcator C-Mod: experiment and modelling
Author(s)Diallo, A.; Terry, J.; Cziegler, I.; Delgado-Aparicio, L.; Churchill, R.M.; Edlund, E.M.; Canik, J.; Snyder, P.; Hughes Jr, Jerry; Baek, Seung Gyou; Labombard, Brian; Hubbard, Amanda E; Davis, Evan Michael; Walk Jr, John R; Reinke, Matthew Logan; Theiler, Christian; Churchill, Randy Michael; Greenwald, Martin J; White, Anne E.; ... Show more Show less
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Performance predictions for future fusion devices rely on an accurate model of the pedestal structure. The candidate for predictive pedestal structure is EPED, and it is imperative to test the underlying hypotheses to further gain confidence for ITER projections. Here, we present experimental work testing one of the EPED hypotheses, namely the existence of a soft limit set by microinstabilities such as the kinetic ballooning mode. This work extends recent work on Alactor C-Mod (Diallo et al 2014 Phys. Rev. Lett. 112 115001), to include detailed measurements of the edge fluctuations and comparisons of edge simulation codes and experimental observations.
DepartmentMassachusetts Institute of Technology. Plasma Science and Fusion Center
Diallo, A. et al. “Quasi-Coherent Fluctuations Limiting the Pedestal Growth on Alcator C-Mod: Experiment and Modelling.” Nuclear Fusion 55, 5 (April 2015): 053003 © 2015 IAEA