English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Gyrokinetic simulations of the fishbone instability in DIII-D tokamak plasmasfind that self-generated zonal flows can dominate the nonlinear saturation bypreventing coherent structures from persisting or drifting in the energeticparticle phase space when the mode frequency down-chirps. Results from thesimulation with zonal flows agree quantitatively, for the first time, withexperimental measurements of the fishbone saturation amplitude and energeticparticle transport. Moreover, the fishbone-induced zonal flows are likelyresponsible for the formation of an internal transport barrier that wasobserved after fishbone bursts in this DIII-D experiment. Finally, gyrokineticsimulations of a related ITER baseline scenario show that the fishbone inducesinsignificant energetic particle redistribution and may enable high performancescenarios in ITER burning plasma experiments.

Saturation of fishbone instability by self-generated zonal flows in tokamak plasmas