Altin, P. A.; Robins, N.P; Döring, D.; Debs, J. E.; Poldy, R.; Figl, C.; Close, J. D.
We describe our experimental setup for creating stable Bose-Einstein condensates (BECs) of ⁸⁵Rb with tunable interparticle interactions. We use sympathetic cooling with ⁸⁷Rb in two stages, initially in a tight Ioffe-Pritchard magnetic trap and subsequently in a weak, large-volume, crossed optical dipole trap, using the 155 G Feshbach resonance to manipulate the elastic and inelastic scattering properties of the ⁸⁵Rb atoms. Typical ⁸⁵Rb condensates contain 4 x 10⁴ atoms with a scattering length...[Show more]
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