J T Mendonc¸a, RMO Galv˜ao
We consider the excitation, nonlinear evolution and saturation of a single coherent mode in a turbulent plasma background. We adopt a generic wave-kinetic description of plasma turbulence, based on a Wigner–Moyal equation, which stays valid well beyond the geometric optics approximation. We illustrate our model by considering the case of a geodesic acoustic mode in a tokamak plasma, in the presence of a broad spectrum of drift wave turbulence. This approach allows us to understand the behavior of waves and oscillations in a turbulent plasma, specifically how these waves can be destabilized by turbulence. Additionally, we discuss the impact of this analysis on energy confinement and anomalous transport in fusion devices, emphasizing its relevance to the ITER project and the transition between different confinement regimes. The findings contribute to a deeper understanding of the nonlinear dynamics at play in plasma, thereby providing insights that are crucial for advancing plasma physics and controlled fusion research.
@article{2b7803a4-cb47-482e-88ac-e5caa2e2f93a,
title={Nonlinear evolution of a single coherent},
author={J T Mendonc¸a and RMO Galv˜ao},
year={2026},
language={en}
}TY - JOUR TI - Nonlinear evolution of a single coherent AU - J T Mendonc¸a AU - RMO Galv˜ao PY - 2026 LA - en ER -
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