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European Physical Society Plasma Physics Conference 2026

29 June 2026 to 3 July 2026
EICC, Edinburgh
Europe/London timezone

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ESR2D: a two-dimensional Fourier-space global gyrokinetic eigenvalue code for the ion-temperature-gradient modes in tokamaks

Not scheduled
20m
EICC, Edinburgh

EICC, Edinburgh

150 Morrison St, Edinburgh EH3 8EE
Poster Presentation Plasma Turbulence and Transport (MCF)

Speaker

Haochuan Wang (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China)

Description

The ion-temperature-gradient (ITG) mode is one of the most extensively studied drift-wave instabilities[1]. In the linear regime, unlike initial-value codes which require time evolution, eigenvalue codes can efficiently compute eigenvalues and eigenmode structures, which are useful for analyzing experimental observations[2]. Existing eigenvalue solvers — including solvers developed in ballooning space or Fourier space — either rely on high toroidal number approximations or simplifying assumptions (e.g., well-circulating particles).
In this work, we derive the two-dimensional (2D) gyrokinetic eigenvalue equations for the ITG modes in the poloidal Fourier space based on the Vlasov-Poisson system, and develop the ESR2D (2D eigenvalue solver in real space) code. This code treats passing and trapped ions in a unified way without simplifying assumptions, and it applies to arbitrary wavelengths. In the linear ITG Cyclone test, the 2D gyrokinetic eigenvalue problem for the electrostatic ITG modes with adiabatic electrons is solved by ESR2D and the results show good agreement with those from the gyrokinetic initial-value codes GENE, NLT and ORB5.

Reference
[1] W. Horton, Rev. Mod. Phys. 71, 735-778 (1999).
[2] J. Dong, G. Jian, A. Wang, H. Sanuki and K. Itoh, Nucl. Fusion 43, 1183 (2003).

Author

Haochuan Wang (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China)

Co-authors

Jie Wang (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Yuefeng Qiu (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Shaojie Wang (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Zihao Wang (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Tiannan Wu (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Yuesong Li (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Yicheng Cai (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China) Shiqi Xiao (Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, China)

Presentation materials

EPS_4page_Haochuan_Wang.pdf
EPS_poster_Haochuan_Wang.pptx