Dependence of Momentum Transport on the dominant turbulence regime in DIII-D with Cross-Validation from AUG

An experiment at the DIII-D tokamak measured intrinsic torque and momentum transport in low torque, reactor relevant plasmas with a range of electron and ion scale turbulence. This work relies on recent advancements in using modulated neutral beam (NB) torque to measure momentum transport at AUG and takes advantage of DIII-D's flexible ion/electron heating and co-/counter-current NB torque systems. Rotation is expected to be largely self-driven in future tokamaks as external actuators will be minimal, and this intrinsic rotation has significant effects on confinement, MHD stability, and scenario access. It was found that intrinsic torque is co-current (ρ<0.7) for dominantly ITG and TEM cases, while mixed-mode cases had low or counter-current torque. Combined with measurements of momentum transport coefficients, peaked rotation is expected in dominantly ITG or TEM plasmas, while flat or hollow rotation is expected for mixed-mode turbulence plasmas. These results are similar to previous AUG results in the parameter space where the two studies overlap, but they also expand the measured parameter space due to the range of turbulence and ExB shear observed.