Gyrokinetic simulations of the core turbulence in the reference JT-60SA scenario Article Swipe

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Oleg Krutkin , Stephan Brunner , Stefano Coda , M.J. Pueschel ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.1088/1741-4326/ae248f

Linear and nonlinear local gyrokinetic simulations of the high power high current JT-60SA scenario are presented, based on inputs from predictive transport modelling. Carbon impurities and fast ions are included in the simulations as well as electromagnetic effects. Toroidal Alfven Eigenmodes (TAEs) are found to significantly affect the nonlinear heat flux. In the absence of TAEs, turbulent transport is found to mainly be driven by the ion temperature gradient mode. In this case, fast particles are found not to have a significant effect on the heat flux. The total heat flux at half normalized minor radius is found to be higher than expected based on the assumed total heating power. A modest 10% decrease of the ion and electron temperature gradients is sufficient to match the expected value. On the other hand, simulations at other radial positions demonstrate heat fluxes lower than expected, consistent with the previous study of a similar scenario and an increase of the ion and electron temperature gradients by about 20-30% is necessary to recover the expected heat flux.

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Computational Physics

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Physics Turbulence Heat flux Electron temperature Toroid Ion RADIUS Mechanics Nonlinear system Temperature gradient Atomic physics Computational physics Gyrokinetics Core (optical fiber) Electron Heat transfer Plasma Flux (metallurgy) Impurity Current (fluid) Materials science Thermal conduction Tokamak Ion transporter

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Landing Page: https://doi.org/10.1088/1741-4326/ae248f
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DOI: https://doi.org/10.1088/1741-4326/ae248f

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Title: Gyrokinetic simulations of the core turbulence in the reference JT-60SA scenario

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Publication year: 2025

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Publication date: 2025-11-26

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Authors: Oleg Krutkin, Stephan Brunner, Stefano Coda, M.J. Pueschel

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Landing page: https://doi.org/10.1088/1741-4326/ae248f

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Concepts: Physics, Turbulence, Heat flux, Electron temperature, Toroid, Ion, RADIUS, Mechanics, Nonlinear system, Temperature gradient, Atomic physics, Computational physics, Gyrokinetics, Core (optical fiber), Electron, Heat transfer, Plasma, Flux (metallurgy), Impurity, Current (fluid), Materials science, Thermal conduction, Tokamak, Ion transporter

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