Transport of energetic ions due to sawteeth, Alfvén eigenmodes and microturbulence

Utilizing an array of new diagnostics and simulation/modelling techniques, recent DIII-D experiments have elucidated a variety of energetic ion transport behaviour in the presence of instabilities ranging from large-scale sawteeth to fine spatial scale microturbulence. Important new insights include...

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Bibliographic Details
Published in:Nuclear fusion 2011-04, Vol.51 (4), p.043012
Main Authors: Pace, D.C, Fisher, R.K, García-Muñoz, M, Heidbrink, W.W, McKee, G.R, Murakami, M, Muscatello, C.M, Nazikian, R, Park, J.M, Petty, C.C, Rhodes, T.L, Staebler, G.M, Van Zeeland, M.A, Waltz, R.E, White, R.B, Yu, J.H, Zhang, W, Zhu, Y.B
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHAPTER 5
DIII-D TOKAMAK
DOUBLET-3 DEVICE
INSTABILITIES
PHYSICS
PLASMAS
REMOVAL
SIMULATIONS
TAIL IONS
TRANSPORT
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Summary:Utilizing an array of new diagnostics and simulation/modelling techniques, recent DIII-D experiments have elucidated a variety of energetic ion transport behaviour in the presence of instabilities ranging from large-scale sawteeth to fine spatial scale microturbulence. Important new insights include sawteeth, such as those of the ITER baseline scenario, causing major redistribution of the energetic ion population; high levels of transport induced by low-amplitude Alfven eigenmodes can be caused by the integrated effect of a large number of simultaneous modes; and microturbulence can contribute to the removal of alpha ash while having little effect on fusion alphas. This paper provides an overview of recent and upcoming results from the DIII-D Energetic Particles research programme.
ISSN:0029-5515
1070-664X
1741-4326
1089-7674
DOI:10.1088/0029-5515/51/4/043012