Equilibrium reconstruction method for self-organized plasmas on reversed field pinches with polarimeter-interferometer

Yuhua HUANG; Ke LIU; Wenzhe MAO; Caoxiang ZHU; Tao LAN; Yiming ZU; Yongkang ZHOU; Xingkang WANG; Peng DENG; Li WANG; Pai PENG; Adi LIU; Chu ZHOU; Haifeng LIU; Hong LI; Jinlin XIE; Yuhong XU; Weixing DING; Wandong LIU; Ge ZHUANG

doi:10.1088/2058-6272/ad79b0

Plasma Science and Technology > 2024 > 26(12): 125104. > DOI: 10.1088/2058-6272/ad79b0

Yuhua HUANG, Ke LIU, Wenzhe MAO, Caoxiang ZHU, Tao LAN, Yiming ZU, Yongkang ZHOU, Xingkang WANG, Peng DENG, Li WANG, Pai PENG, Adi LIU, Chu ZHOU, Haifeng LIU, Hong LI, Jinlin XIE, Yuhong XU, Weixing DING, Wandong LIU, Ge ZHUANG. Equilibrium reconstruction method for self-organized plasmas on reversed field pinches with polarimeter-interferometer[J]. Plasma Science and Technology, 2024, 26(12): 125104. DOI: 10.1088/2058-6272/ad79b0

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Equilibrium reconstruction method for self-organized plasmas on reversed field pinches with polarimeter-interferometer

1.
School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
2.
Institute for Fusion Theory and Simulation, Department of Physics, Zhejiang University, Hangzhou 310027, People’s Republic of China
3.
School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

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Author Bio:
Wenzhe MAO: maozhe@ustc.edu.cn

Caoxiang ZHU: caoxiangzhu@ustc.edu.cn
Corresponding author:
Wenzhe MAO, maozhe@ustc.edu.cn

Caoxiang ZHU, caoxiangzhu@ustc.edu.cn
Received Date: March 19, 2024
Revised Date: September 08, 2024
Accepted Date: September 10, 2024
Available Online: September 11, 2024
Published Date: November 07, 2024

Graphical Abstract

Abstract

Abstract

In the reversed field pinch (RFP), plasmas exhibit various self-organized states. Among these, the three-dimensional (3D) helical state known as the “quasi-single-helical” (QSH) state enhances RFP confinement. However, accurately describing the equilibrium is challenging due to the presence of 3D structures, magnetic islands, and chaotic regions. It is difficult to obtain a balance between the available diagnostic and the real equilibrium structure. To address this issue, we introduce KTX3DFit, a new 3D equilibrium reconstruction code specifically designed for the Keda Torus eXperiment (KTX) RFP. KTX3DFit utilizes the stepped-pressure equilibrium code (SPEC) to compute 3D equilibria and uses polarimetric interferometer signals from experiments. KTX3DFit is able to reconstruct equilibria in various states, including axisymmetric, double-axis helical (DAx), and single-helical-axis (SHAx) states. Notably, this study marks the first integration of the SPEC code with internal magnetic field data for equilibrium reconstruction and could be used for other 3D configurations.
- equilibrium reconstruction,
- polarimeter-interferometer,
- multi-region relaxed MHD,
- 3D self-organized states,
- reversed field pinch

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Nos. 12175227 and 12375226), the National Magnetic Confinement Fusion Program of China (No. 2022YFE03100004), the Fundamental Research Funds for the Central Universities (No. USTC 20210079), and the Collaborative Innovation Program of Hefei Science Center, CAS (No. 2022HSC-CIP022).

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