Radial properties of the geodesic acoustic mode | Zendy

Zhenqian Li | Zendy; Jiaqi Dong | Zendy; Zheng-Mao Sheng | Zendy; M. Y. Yu | Zendy; Weixing Wang | Zendy

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Radial properties of the geodesic acoustic mode

Author(s) -

Zhenqian Li,

Jiaqi Dong,

Zheng-Mao Sheng,

M. Y. Yu,

Weixing Wang

Publication year - 2017

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.5004427

Subject(s) - physics , geodesic , tokamak , toroid , phase velocity , plasma , computational physics , kinetic energy , thermal , turbulence , radial velocity , mechanics , classical mechanics , astrophysics , optics , nuclear physics , mathematical analysis , mathematics , meteorology , stars

In magnetized toroidal plasmas, neoclassical effects and turbulent drift waves can induce the geodesic acoustic mode (GAM). We simulate the GAM using the gyro-kinetic code GTS for typical tokamak parameters and investigate its properties, especially its frequency continuum, evolution of its radial wave number, and propagation characteristics. The simulation results are compared with those of the relevant theory and experiment. It is found that the radial phase velocity of the GAM is roughly proportional to the ion thermal speed.

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