Low-frequency turbulence suppression by amplification of synchronized zonal flow with energetic particle driven modes

We investigate the suppression of the turbulent transport associated to the emergence of spontaneous internal transport barriers, due to the combined collective effects played by trapped electrons and energetic passing ions. Numerical experiments performed with a ‘particle mode’ model based on a dou...

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Bibliographic Details
Published in:Nuclear fusion 2023-10, Vol.63 (10), p.104002
Main Authors: Ghizzo, A., Del Sarto, D.
Format: Article
Language:English
Subjects:
gyrokinetic modelling
phase synchronization
Physics
Plasma Physics
transport barrier
vlasov equation
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Summary:We investigate the suppression of the turbulent transport associated to the emergence of spontaneous internal transport barriers, due to the combined collective effects played by trapped electrons and energetic passing ions. Numerical experiments performed with a ‘particle mode’ model based on a double gyro-average over the fast cyclotron phase and over the bounce (or transit) phases are used to show the role played by energetic particles in the suppression of the ion-temperature-gradient driven turbulence. We show this occur via phase locking in a Kuramoto-type synchronization process.
ISSN:0029-5515
1741-4326
DOI:10.1088/1741-4326/acee95