Gyrofluid/Gyrokinetic Simulations Accurately Predict Many Experiments

IFS-PPPL transport model predicts the confinement time tau_E due to turbulent losses for a wide range of TFTR L-mode plasmas better than a widely used empirical scaling:



Qualitatively predicts the dramatic transition to the Supershot regime, though with some sensitivity to impurity or other assumptions (green vs. red curves):



IFS-PPPL reduced transport model based on nonlinear gyrofluid and comprehensive linear gyrokinetic codes (Kotschenreuther, Dorland (IFS), Beer, Hammett (PPPL) Phys. Plasmas 2, 2381 (1995))

Caveats: Temperatures predicted for r/a < 0.8 ignoring the edge and using the measured density profiles. Extensions to a more complete model and a wider range of plasma regimes is well under way.