| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Global Effects on Drift Wave Microturbulence in Tokamak Plasmas |
| Hui Li1*, Ji-Quan Li2, and Zheng-Xiong Wang1* |
1Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
2Southwestern Institute of Physics, Chengdu 610041, China
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| Cite this article: |
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Hui Li, Ji-Quan Li, and Zheng-Xiong Wang 2023 Chin. Phys. Lett. 40 105201 |
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Abstract Microturbulence excited by ion temperature gradient (ITG)-dominant and trapped electron mode (TEM)-dominant instabilities is investigated by employing an extended fluid code (ExFC) based on the so-called Landau fluid model, which includes the trapped electron dynamics. Firstly, the global effect is emphasized through direct comparison of ITG and TEM instability domains based on local and global simulations. The global effect makes differences in both linear instability and nonlinear transport, including the fluxes and the structure of zonal flow. The transitions among ITG, TEM, and ITG & TEM (ITG & TEM represents that ITG and TEM coexist with different wavelengths) instabilities/turbulence depend not only on the three key drive forces $({R/L_{\rm n}, R/L_{\rm Te}, R/L_{\rm Ti}})$ but also on their global (profile) effects. Secondly, a lot of electrostatic linear gyro-fluid simulations are concluded to obtain a distribution of the instability.
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Received: 02 July 2023
Published: 26 September 2023
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| PACS: |
52.35.Qz
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(Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.))
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52.65.-y
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(Plasma simulation)
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52.35.Ra
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(Plasma turbulence)
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52.25.Fi
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(Transport properties)
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