Electromagnetic Transport From Microtearing Mode Turbulence

Guttenfelder, W ; Kaye, S M ; Nevins, W M ; Wang, E ; Bell, R E ; Hammett, G W ; LeBlanc, B P ; Mikkelsen, D R

关键词: ELECTRONS;    MAGNETIC FIELDS;    SHEAR;    TRAJECTORIES;    TRANSPORT;    TURBULENCE Tokamaks;    Turbulence;    Gyrokinetic Simulations;   

DOI  :  10.2172/1010969
RP-ID  :  PPPL-4609
PID  :  OSTI ID: 1010969
Others  :  TRN: US1102429

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 摘 要 】

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.