Journal
PHYSICS OF PLASMAS
Volume 23, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4962997
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Funding
- U.S. DoE GRANT
- National Magnet Confinement Fusion Research Program [2013GB104004, 2013GB111004]
- National Science Foundation of China [11575157, 11235009]
- Fundamental Research Fund for Chinese Central Universities [2016FZA3003]
- EUROfusion Consortium [633053]
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Generation of zonal flow (ZF) by energetic particle (EP) driven toroidal Alfven eigenmode (TAE) is investigated using nonlinear gyrokinetic theory. It is found that nonlinear resonant EP contribution dominates over the usual Reynolds and Maxwell stresses due to thermal plasma nonlinear response. ZF can be forced driven in the linear growth stage of TAE, with the growth rate being twice the TAE growth rate. The ZF generation mechanism is shown to be related to polarization induced by resonant EP nonlinearity. The generated ZF has both the usual meso-scale and micro-scale radial structures. Possible consequences of this forced driven ZF on the nonlinear dynamics of TAE are also discussed. Published by AIP Publishing.
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