Linear simulation of ion temperature gradient driven instabilities in W7-X and LHD stellarators using GTC
Hongyu Wang, Zhihong Lin, Ihor Holod, Jian Bao, Lei Shi, and Sam, Taimourzadeh
TL;DR
This paper demonstrates the use of the upgraded GTC code to perform linear simulations of ion temperature gradient driven instabilities in stellarators W7-X and LHD, analyzing mode structures and convergence properties.
Contribution
It introduces the capability of GTC to simulate ITG instabilities in non-axisymmetric stellarator configurations for the first time.
Findings
Successful linear simulations of ITG in W7-X and LHD
Analysis of mode structures and convergence properties
Insights into the characteristics of ITG in stellarators
Abstract
The global gyrokinetic toroidal code (GTC) has been recently upgraded to do simulations in non-axisymmetric equilibrium configuration, such as stellarators. Linear simulation of ion temperature gradient (ITG) driven instabilities has been done in Wendelstein7-X (W7-X) and Large Helical Device (LHD) stellarators using GTC. Several results are discussed to study characteristics of ITG in stellarators, including toroidal grids convergence, nmodes number convergence, poloidal and parallel spectrums, and electrostatic potential mode structure on flux surface.
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Taxonomy
TopicsMagnetic confinement fusion research · Ionosphere and magnetosphere dynamics · Superconducting Materials and Applications