Interplay between magnetic shear and triangularity in ion temperature gradient and trapped electron mode dominated plasmas

摘要

Local gyrokinetic simulations, performed with the GENE code, are used to investigate the interaction between (negative) triangularity delta and magnetic shear s, in both ion temperature gradient and trapped electron mode dominated plasmas. Magnetic shear turns out to influence in a non-trivial way the effect of negative triangularity. Also, delta 1 but not anymore when shear is reduced. In certain parameter regimes, this effect can be inverted, up to obtaining higher fluxes when delta 0 counterpart.