title: Electromagnetic transport from microtearing mode turbulence.
abstract: This Letter presents nonlinear gyrokinetic simulations of microtearing mode turbulence. The simulations include collisional and electromagnetic effects and use experimental parameters from a high-β discharge in the National Spherical Torus Experiment. 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.
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton New Jersey 08543, USA.
authors.forename: W
authors.initials: W
authors.lastname: Guttenfelder
authors.forename: J
authors.initials: J
authors.lastname: Candy
authors.forename: S M
authors.initials: SM
authors.lastname: Kaye
authors.forename: W M
authors.initials: WM
authors.lastname: Nevins
authors.forename: E
authors.initials: E
authors.lastname: Wang
authors.forename: R E
authors.initials: RE
authors.lastname: Bell
authors.forename: G W
authors.initials: GW
authors.lastname: Hammett
authors.forename: B P
authors.initials: BP
authors.lastname: LeBlanc
authors.forename: D R
authors.initials: DR
authors.lastname: Mikkelsen
authors.forename: H
authors.initials: H
authors.lastname: Yuh