content_image/343845.jpg
<img src='content_image/343845.jpg'>

of ρ$_{i}$ at unit order, in turn, necessitates a nonlinear gyrofluid model (and at some later date, a nonlinear gyrokinetic model). 

The characteristics of the blowout at various plasma beta is studied for 0 . 5 · 10 − 4 < β$_{e}$ < 8 · 10 − $^{4}$, with the absolute β a factor of 4 . 8 higher due to the T$_{i}$/T$_{e}$ = 1 . 2 value. A competition between unstable growth of ITG high-n modes and IBM low-n modes is observed: For low β an early onset of ITG turbulence degenerates the profile and influences the strength of the IBM. For large β the nonlinear saturation is acting faster and stronger. The two effects lead to a rather nondistinctive result concerning the peak ELM flux as shown in Fig. 6, with a continuous transition between ITG and IBM triggered onset of the turbulent aftermath. 

The presence or absence of background current gradient terms, which in this model are set by replacing ( ˜ J$_{|}$$_{|}$ → ˜ J$_{|}$$_{|}$ + J 0 ) everywhere the electron parallel velocity ˜ ν$_{|}$$_{|}$ appears in the equations, with J 0 given by the q profile, was found to have no discernible effect on the result. Indeed self-consistent inclusion of ∇ J 0 effects with possible role in the L-to-H 

