Fig. 2
Log-log plot of the probability distribution of Bz versus Bz for a bipolar field diffusing with time. The Bz spatial distribution is described by Eq. (9). The time t is normalised by the initial time when R/a = 1 is selected (blue line). Only Bz> 1 is supposed to be detectable. The black straight line has a slope −1 for reference.
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