On the effect of negative triangularity on Ion Temperature Gradient turbulence in tokamaks
Résumé
Considering the same magnetic equilibrium and plasma conditions as in [Duff et al. Phys.Plasmas 29,
012303(2022)], we perform linear and nonlinear simulations of electrostatic ion temperature gradient turbulence investigating the role of triangularity δ. Differently from what was previous reported, we find that
triangularity increases the transport level regardless of its sign, but more strongly when δ is positive. For the
case analyzed, we identify the shear of triangularity as the critical parameter determining the transport level,
indicating that even in the local limit negative triangularity can reduce the transport efficiently, suggesting
that confinement improvement can also be expected for larger devices.
Domaines
Physique [physics]
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