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Moment-Based Approach to the Flux-Tube linear Gyrokinetic Model
B. J. Frei, A. C. D. Hoffmann, P. Ricci +2
This work reports on the development and numerical implementation of the linear electromagnetic gyrokinetic (GK) model in a tokamak flux-tube geometry using a moment approach based…
Nonlocal effects in negative triangularity TCV plasmas
G. Merlo, Z. Huang, C. Marini +7
Global gradient driven GENE gyrokinetic simulations are used to investigate TCV plasmas with negative triangularity. Considering a limited L-mode plasma, corresponding to an experi…
A non-twisting flux tube for local gyrokinetic simulations
Justin Ball, Stephan Brunner
Local gyrokinetic simulations use a field-aligned domain that twists due to the magnetic shear of the background magnetic equilibrium. However, if the magnetic shear is strong and/…
Eliminating turbulent self-interaction through the parallel boundary condition in local gyrokinetic simulations
Justin Ball, Stephan Brunner, Ajay C. J
In this work, we highlight an issue that may reduce the accuracy of many local nonlinear gyrokinetic simulations - turbulent self-interaction through the parallel boundary conditio…
First principles gyrokinetic analysis of electromagnetic plasma instabilities
Natalia Tronko, Alberto Bottino, Cristel Chandre +5
A two-fold analysis of electromagnetic core tokamak instabilities in the framework of the gyrokinetic theory is presented. First principle theoretical foundations of the gyrokineti…
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit
Justin Ball, Stephan Brunner, Ben F. McMillan
The cold ion limit of the local gyrokinetic model is rigorously taken to produce a nonlinear system of fluid equations that includes background flow shear. No fluid closure is requ…