  The aim of this study is to analyze the feedback process between the magnetic
turbulence and the pressure gradients in LHD inward-shifted configurations as
well as its role in the transition between the soft-hard MHD regimes for
instabilities driven by the mode $1/2$ in the middle plasma. In the present
paper we summarize the results of two simulations with different Lundquist
numbers, $S = 2.5 \times 10^5$ and $10^6$, assuming a plasma in the slow
reconnection regime. The results for the high Lundquist number simulation shows
that the magnetic turbulence and the pressure gradient in the middle plasma
region of LHD are below the critical value to drive the transition to the hard
MHD regime, therefore only relaxations in the soft MHD limit are triggered
($1/2$ sawtooth like events) [Phys. Plasmas 19, 082512 (2012)]. In the case of
the simulation with low Lundquist number, the system reaches the hard MHD limit
and a plasma collapse is observed.
