Measuring the beamlet divergence in NBI systems for fusion: A diagnostic comparison
Fusion Engineering and Design Elsevier 215 (2025) 114951
Suppression of temperature-gradient-driven turbulence by sheared flows in fusion plasmas
Journal of Plasma Physics Cambridge University Press (CUP) 91:2 (2025) e58
Measurement of Zero-Frequency Fluctuations Generated by Coupling between Alfvén Modes in the JET Tokamak.
Physical review letters American Physical Society (APS) 134:9 (2025) 95103
Abstract:
We report the first experimental detection of a zero-frequency fluctuation that is pumped by an Alfvén mode in a magnetically confined plasma. Core-localized Alfvén modes of frequency inside the toroidicity-induced gap (and its harmonics) exhibit three-wave coupling interactions with a zero-frequency fluctuation. The observation of the zero-frequency fluctuation is consistent with theoretical and numerical predictions of zonal modes pumped by Alfvén modes, and is correlated with an increase in the deep core ion temperature, temperature gradient, confinement factor H_{89,P}, and a reduction in the main ion heat diffusivity. Despite the energetic particle transport induced by the Alfvén eigenmodes, the generation of a zero-frequency fluctuation that can suppress the turbulence leads to an overall improvement of confinement.Insights into stripping losses of negative ions in an ITER-like pre-acceleration system
Plasma Physics and Controlled Fusion IOP Publishing 67:1 (2025) 015011
Influence of the density gradient on turbulent heat transport at ion-scales: an inter-machine study with the gyrokinetic code stella
Nuclear Fusion IOP Publishing 65:1 (2025) 016062