Kinetic effect of toroidal rotation on the geodesic acoustic mode

Journal Article · Thu Jan 15 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4905517· OSTI ID:22407997

Ye, L.; Zhou, D.; Xiao, X. ^[1]; Wang, S. ^[2]

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1. Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031 (China)
2. Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

Kinetic effects of the toroidal rotation on the geodesic acoustic mode are theoretically investigated. It is found that when the toroidal rotation increases, the damping rate increases in the weak rotation regime due to the rotation enhancement of wave-particle interaction, and it decreases in the strong rotation regime due to the reduction of the number of resonant particles. Theoretical results are consistent with the behaviors of the geodesic acoustic mode recently observed in DIII-D and ASDEX-Upgrade. The kinetic damping effect of the rotation on the geodesic acoustic mode may shed light on the regulation of turbulence through the controlling the toroidal rotation.

• OSTI ID: 22407997
• Journal Information: Physics of Plasmas, Vol. 22, Issue 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASDEX TOKAMAK
DOUBLET-3 DEVICE
GEODESICS
PARTICLE INTERACTIONS
RESONANCE PARTICLES
ROTATING PLASMA
TOROIDAL CONFIGURATION
TURBULENCE