Intermittency and turbulence in a magnetically confined fusion plasma
We investigate the intermittency of magnetic turbulence as measured in reversed field pinch plasmas. We show that the probability distribution functions of magnetic field differences are not scale invariant; that is, the wings of these functions are more important at the smallest scales, a classical signature of intermittency. We show that scaling laws appear also in a region very close to the external wall of the confinement device, and we present evidences that the observed intermittency increases moving towards the wall.
Carbone
V
Dipartimento di Fisica, Universita degli studi della Calabria, 87036 Rende (CS), ItalyIstituto Nazionale di Fisica della Materia, Unita di Cosenza, 87036 Italy.
Sorriso-Valvo
L
Martines
E
Antoni
V
Veltri
P