Effect of energetic ions on edge-localized modes in tokamak plasmas

Thermonuclear Fusion Edge-localized mode
DOI: 10.1038/s41567-024-02715-6 Publication Date: 2025-01-06T10:02:29Z
AUTHORS (776)
ABSTRACT
Abstract The most efficient and promising operational regime for the International Thermonuclear Experimental Reactor tokamak is high-confinement mode. In this regime, however, periodic relaxations of plasma edge can occur. These edge-localized modes pose a threat to integrity fusion device. Here we reveal strong impact energetic ions on spatio-temporal structure in tokamaks using nonlinear hybrid kinetic–magnetohydrodynamic simulations. A resonant interaction between fast at electromagnetic perturbations from mode leads an energy momentum exchange. Energetic modify, example, amplitude, frequency spectrum crash timing modes. simulations reproduce some observations that feature abrupt large crashes. results indicate that, Reactor, fusion-born alpha particles neutral beam injection, main heating particle source, expected with predicted perturbations. This work advances understanding physics underlying crashes presence highlights importance including ion kinetic effects optimization control techniques regimes are free such
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