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Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario

Author
Abstract

Previous studies with first-principle-based integrated modelling suggested that ETG turbulence may lead to an anti-GyroBohm isotope scaling in JET high-performance hybrid H-mode scenarios. A dedicated comparison study against higher-fidelity turbulence modelling invalidates this claim. Ion-scale turbulence with magnetic field perturbations included, can match the power balance fluxes within temperature gradient error margins. Multiscale gyrokinetic simulations from two distinct codes produce no significant ETG heat flux, demonstrating that simple rules-of-thumb are insufficient criteria for its onset.

Year of Publication
2022
Journal
Nuclear Fusion
Volume
62
Issue
8
Number of Pages
086025
Publisher
IOP Publishing
URL
https://arxiv.org/abs/2209.09683
DOI
10.1088/1741-4326/ac7535
PId
633c98b0b58acc1f9022c6c11921bd13
Alternate Journal
Nucl. Fusion
Label
OA
Journal Article
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