Quasilinear nature of L-mode edge turbulent transport in fluid nonlinear simulations

In tokamak plasma, the edge region is characterized by larger gradients, higher resisitivity and a shorter distance to the critical [ image ] compared to core plasma. By edge region, we mean the region where the pedestal forms when transiting from the L to H-mode: [ image ]. This paper shows, using a three-dimensional electromagnetic fluid turbulent transport model, that the quasilinear hypothesis is valid in the edge region. The diamagnetic coupling is stabilizing while [ image ] is destabilizing. The effect of [ image ] on the characteristic times of turbulence is studied, as is its effect on the Reynolds stress and the Maxwell stress in these fluid simulations.