Abstract
In this report, we present a hybrid kinetic–MHD approach realized within the
code MEPHIT for the linear modelling of the interaction of resonant magnetic perturbations (RMPs) with tokamak plasmas. The model uses an iterative approach where the solution of Ampère’s law in realistic device geometry is combined with the computation of plasma response currents to a given magnetic perturbation. The latter computation employs the ideal MHD model in most of the plasma volume, and a collisional kinetic model in the resonant layers centered around rational flux surfaces. Within a 1D kinetic model, a straight inhomogeneous plasma cylinder geometry is assumed, and the finite Larmor radius expansion of plasma response current and charge densities up to second order is employed. The hybrid kinetic–MHD model is applied to RMPs in ASDEX Upgrade experiments on edge-localized mode suppression and compared to the results of the ideal MHD code GPEC.
code MEPHIT for the linear modelling of the interaction of resonant magnetic perturbations (RMPs) with tokamak plasmas. The model uses an iterative approach where the solution of Ampère’s law in realistic device geometry is combined with the computation of plasma response currents to a given magnetic perturbation. The latter computation employs the ideal MHD model in most of the plasma volume, and a collisional kinetic model in the resonant layers centered around rational flux surfaces. Within a 1D kinetic model, a straight inhomogeneous plasma cylinder geometry is assumed, and the finite Larmor radius expansion of plasma response current and charge densities up to second order is employed. The hybrid kinetic–MHD model is applied to RMPs in ASDEX Upgrade experiments on edge-localized mode suppression and compared to the results of the ideal MHD code GPEC.
Original language | English |
---|---|
Journal | Plasma Physics and Controlled Fusion |
Publication status | Submitted - 15 Oct 2024 |