Scaling properties of superfluid He-3 in aerogel

We have investigated the superfluid transition of He-3 in different samples of silica aerogel. Several of these samples have been characterized using x-ray imaging, yielding information about the microstructure of the aerogel . In comparing new measurements on a 99.5% sample with previous observation s on the behavior of He-3 in 98% porous aerogel we have found evidence for a scaling of the superfluid transition temperature to the correlation lengt h of the aerogel. Furthermore, the superfluid density exhibits a similar un iversal behaviour otter a range of values of reduced temperature. We discus s these new results in the contest of superfluid pairing in the presence of a correlated disorder, specifically focussing on the fractal nature of the aerogel.