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Gyrokinetic prediction of microtearing turbulence in standard tokamaks

2012; American Institute of Physics; Volume: 19; Issue: 5 Linguagem: Inglês

10.1063/1.3694663

1527-2419

H. Doerk, F. Jenko, T. Görler, D. Told, M. J. Pueschel, D. R. Hatch,

Laser-Plasma Interactions and Diagnostics

First global gyrokinetic simulations of microtearing instabilities in ASDEX Upgrade geometry provide increasing evidence for the existence of these modes in standard tokamaks. It is found that even in only moderately large devices, nonlocal effects like profile shearing are negligible, supporting the use of an efficient flux-tube approach. Nonlinear gyrokinetic simulations show that the resulting level of magnetic electron heat flux can be experimentally relevant.