Ion temperature gradient mode mitigation by energetic particles, mediated by forced-driven zonal flows

被引：0

作者：

Sama, J.N. ^{[1
]}

Biancalani, A. ^{[2
]}

Bottino, A. ^{[3
]}

Del Sarto, D. ^{[1
]}

Dumont, R.J. ^{[4
]}

Di Giannatale, G. ^{[5
]}

Ghizzo, A. ^{[1
]}

Hayward-Schneider, T. ^{[3
]}

Lauber, Ph. ^{[3
]}

McMillan, B. ^{[6
]}

Mishchenko, A. ^{[7
]}

Muruggapan, M. ^{[5
]}

Rettino, B. ^{[3
]}

Rofman, B. ^{[5
]}

Vannini, F. ^{[3
]}

Villard, L. ^{[5
]}

Wang, X. ^{[3
]}

机构：

[1] Université de Lorraine, CNRS, IJL, Nancy,54011, France

[2] Léonard de Vinci Pôle Universitaire, Research Center, Paris La Défense,92400, France

[3] Max Planck Institute for Plasma Physics, Garching,85748, Germany

[4] CEA, IRFM, Saint-Paul-lez-Durance,F-13108, France

[5] Swiss Plasma Center, EPFL, Lausanne,1015, Switzerland

[6] Center for Fusion, Space and Astrophysics, University of Warwick, Coventry,CV4 7AL, United Kingdom

[7] Max Planck Institute for Plasma Physics, Greifswald,17491, Germany

来源：

Physics of Plasmas | 2024年 / 31卷 / 11期

关键词：

Aerodynamics - Positive ions - Vortex flow;

D O I：

10.1063/5.0226833

中图分类号：

学科分类号：

摘要：

In this work, we use the global electromagnetic and electrostatic gyro kinetic approaches to investigate the effects of zonal flows forced-driven by Alfvén modes due to their excitation by energetic particles on the dynamics of ITG (ion temperature gradient) instabilities. The equilibrium of the 92416 JET tokamak shot is considered. The linear, nonlinear Alfvén modes, and the zonal flow dynamics are investigated, and their respective radial structures and saturation levels are reported. ITG dynamics in the presence of the zonal flows excited by these Alfvén modes are also investigated. The zonal flows forced-driven by Alfvén modes can significantly impact the ITG dynamics. A zonal flow amplitude scan reveals the existence of an inverse relation between the zonal flow amplitude and the ITG growth rate. These results indicate that forced-driven zonal flows can be an important indirect part of turbulence mitigation due to the injection of energetic particles. © 2024 Author(s).

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