  The study of spatial and temporal scales on which small magnetic structures
(magnetic elements) are organized in the quiet Sun may be approached by
determining how they are transported on the solar photosphere by convective
motions. The process involved is diffusion. Taking advantage of Hinode high
spatial resolution magnetograms of a quiet Sun region at the disk center, we
tracked 20145 magnetic elements. The large field of view (~50 Mm) and the long
duration of the observations (over 25 hours without interruption at a cadence
of 90 seconds) allowed us to investigate the turbulent flows at unprecedented
large spatial and temporal scales. In the field of view, in fact, an entire
supergranule is clearly recognizable. The magnetic elements displacement
spectrum shows a double-regime behavior: superdiffusive (gamma=1.34 +/- 0.02)
up to granular spatial scales (~1500 km), and slightly superdiffusive
(gamma=1.20 +/- 0.05) up to supergranular scales.
