Journal
PHYSICS OF PLASMAS
Volume 27, Issue 3, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.5126872
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Funding
- China National Magnetic Confinement Fusion Energy Research Project [2015GB120005]
- National Natural Science Foundation of China [11675175]
- Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology [2018CXFX009]
- U.S. Department of Energy by the Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
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The zero frequency zonal flow (ZFZF) excitation due to the nonlinear geodesic acoustic mode (GAM) is investigated in the framework of gyro-kinetic equations, which were first investigated by Chen et al. [Europhys. Lett. 107, 15003 (2014)]. We show that after integrating over the velocity space, the first order finite orbit width (FOW) term of nonlinear GAM disappears, and hence, the second order FOW term should be taken into account to generate the ZFZF. The anisotropy of the equilibrium is also considered. Published under license by AIP Publishing.
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