An extended hybrid magnetohydrodynamics gyrokinetic model for numerical simulation of shear Alfv\'en waves in burning plasmas

TL;DR

This paper develops an extended hybrid magnetohydrodynamics gyrokinetic model that incorporates thermal ion effects and energetic particle behaviors to improve the simulation of shear Alfvén waves in burning plasmas.

Contribution

It introduces an analytically derived extended model and implements it in the XHMGC code for more accurate simulation of Alfvénic modes in fusion plasmas.

Findings

Enhanced simulation accuracy for shear Alfvén waves.

Inclusion of thermal ion effects in gyrokinetic modeling.

Better understanding of energetic particle-driven modes.

Abstract

Adopting the theoretical framework for the generalized fishbonelike dispersion relation, an extended hybrid magnetohydrodynamics gyrokinetic simulation model has been derived analytically by taking into account both thermal ion compressibility and diamagnetic effects in addition to energetic particle kinetic behaviors. The extended model has been used for implementing an eXtended version of Hybrid Magnetohydrodynamics Gyrokinetic Code (XHMGC) to study thermal ion kinetic effects on Alfv\'enic modes driven by energetic particles, such as kinetic beta induced Alfv\'en eigenmodes in tokamak fusion plasmas.