Gyrokinetic analysis of core turbulent transport in high-β scenarios in the EHL-2 spherical torus

Abstract ENN is dedicated to exploring the commercialization of fusion energy by utilizing the EHL-2 spherical device as a next-generation platform. This research focuses on evaluating turbulent transport in the core ion transport barrier region of EHL-2, specifically investigating the effects of plasma β on transport features. Gyrokinetic simulation results indicate that under the typical operation scenario, transport is predominantly driven by electrostatic ion temperature gradient modes and trapped electron modes. Nevertheless, as the total β approaches 20%, nonlinear excitation of the electromagnetic mode is discovered, leading to an explosive increase in transport as well as zonal flow erosion due to enhanced magnetic fluctuations. It is also found that the external E × B rotational shear is only effective in suppressing the turbulence when the electromagnetic modes are linearly stable or nonlinearly unstable.

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Publication Details

Journal
Plasma Physics and Controlled Fusion
Published
2025-01-09
DOI
https://doi.org/10.1088/1361-6587/ada824
Citations
2
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
1.87

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article

Gyrokinetic analysis of core turbulent transport in high-β scenarios in the EHL-2 spherical torus

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2 citations
Plasma Physics and Controlled Fusion
Magnetic confinement fusion research
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article

Gyrokinetic analysis of core turbulent transport in high-β scenarios in the EHL-2 spherical torus

Yuejiang Shi, Huarong Du, J.Q. Xu, Jiaqi Dong, Muzhi Tan, Xiuchen Jiang, Chaoliang Xu, Huasheng Xie, Yumin Wang, Y. Liang, Bing Liu, Xiaohe Wu, Xiang Gu, Xueyun Wang
article en
2 citations

Abstract

Abstract ENN is dedicated to exploring the commercialization of fusion energy by utilizing the EHL-2 spherical device as a next-generation platform. This research focuses on evaluating turbulent transport in the core ion transport barrier region of EHL-2, specifically investigating the effects of plasma β on transport features. Gyrokinetic simulation results indicate that under the typical operation scenario, transport is predominantly driven by electrostatic ion temperature gradient modes and trapped electron modes. Nevertheless, as the total β approaches 20%, nonlinear excitation of the electromagnetic mode is discovered, leading to an explosive increase in transport as well as zonal flow erosion due to enhanced magnetic fluctuations. It is also found that the external E × B rotational shear is only effective in suppressing the turbulence when the electromagnetic modes are linearly stable or nonlinearly unstable.

Plasma Physics and Controlled FusionVol. 67(2)
Xidian University (CN), Forschungszentrum Jülich (DE), Chinese Academy of Sciences (CN), ENN (China) (CN), Institute of Plasma Physics (CN), Southwestern Institute of Physics (CN), Southwest Jiaotong University (CN)
National Supercomputing Center, Korea Institute of Science and Technology Information
Affordable and clean energy
Openalex Percentile: Top 16%
Magnetic confinement fusion research
1.87
DOIOpen Access PDFOpenAlex
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