The influences of the Magnetic Shear on the Improvement of the Quality   of the Confinement in Plasma of Tokamak
  In this paper we have studied the influence of reversed shear on the improvement of the confinement's quality in the plasma of tokamak and especially in reducing the anomalous transport. For that, we have used a special model for the drift wave fields. Comparison between particles trajectories for normal and reversed shear is carried out in 2 D and 3 D presentation. Also, the diffusion coefficient of particles for the two cases, normal and negative shear, is evaluated. 
Mahmoud Elmouden, Dennoum Saifaoui, Awatif Dezairi, Hicham Imzi, Aziz   Rouak