Excitation of zonal flow by nonlinear geodesic acoustic mode

Ren, Haijun; Xu, X. Q.

doi:10.1063/1.5126872

Title: Excitation of zonal flow by nonlinear geodesic acoustic mode

Journal Article · Sun Mar 01 00:00:00 EST 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5126872· OSTI ID:1877966

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Univ. of Science and Technology of China, Anhui (China); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); China National Magnetic Confinement Fusion Energy Research Project; National Natural Science Foundation of China (NSFC); Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology

Grant/Contract Number:: AC52-07NA27344; 2015GB120005; 11675175; 2018CXFX009

OSTI ID:: 1877966

Alternate ID(s):: OSTI ID: 1602335

Report Number(s):: LLNL-JRNL-837392; 1044769; TRN: US2307445

Journal Information:: Physics of Plasmas, Vol. 27, Issue 3; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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