Electromagnetic Transport From Microtearing Mode Turbulence
Authors: W. Guttenfelder, J. Candy, S.M. Kaye, W.M. Nevins, E. Wang, R.E. Bell, G.W. Hammett, B.P. LeBlanc, D.R. Mikkelsen, and H. Yuh
Abstract:
This Letter presents non-linear gyrokinetic simulations of microtearing mode turbulence. The
simulations include collisional and electromagnetic effects and use experimental parameters
from a high beta discharge in the National Spherical Torus Experiment (NSTX). The predicted
electron thermal transport is comparable to that given by experimental analysis, and it is
dominated by the electromagnetic contribution of electrons free streaming along the resulting
stochastic magnetic field line trajectories. Experimental values of flow shear can significantly
reduce the predicted transport.
__________________________________________________
Submitted to: Physical Review Letters (December 2010)
__________________________________________________
Download PPPL-4609 (pdf 971 KB 10 pp)
__________________________________________________