Statistical properties of edge plasma turbulence in the Mega-Amp Spherical Tokamak and the Large Helical Device

Introduction. The extent to which universality is displayed by edge plasma turbulence in toroidal magnetically confined plasmas is an important but unresolved issue [1, 2]. The iden-tification of universal features requires the comparison of turbulence properties for a range of operational regimes in a range of confinement systems. Here, we focus on the statistical proper-ties of measurements of ion saturation current Isat made by Langmuir probes in the edge regio