Intermittency and turbulence in a magnetically confined fusion plasma

We investigate the intermittency of magnetic turbulence as measured in reve rsed field pinch plasmas. We show that the probability distribution functio ns of magnetic field differences are not scale invariant; that is, the wing s of these functions are more important at the smallest scales, a classical signature of intermittency. We show that scaling laws appear also in a reg ion very close to the external wall of the confinement device, and we prese nt evidences that the observed intermittency increases moving towards the w all.