Magnetic trapping of a cold Rb-Cs atomic mixture

Details Magnetic trapping of a cold Rb-Cs atomic mixture Magnetic trapping of a cold Rb-Cs atomic mixture

2007-11-16

arxiv.org/abs/0711.2598v2

Physics

Condensed Matter

Other Condensed Matter

16 pages, 5 figures Added references, corrected typos, minor changes to figures and text

Scientific paper

10.1088/0953-4075/41/3/035303

We present an apparatus for the study of an ultracold gaseous atomic mixture of 133Cs and 87Rb. The mixture is prepared using a double magneto-optical trap (MOT) system in which a two-species pyramid MOT acts as a source of cold atoms for a `science' MOT. Measurements of the interspecies trap loss rate coefficients beta_RbCs and beta_CsRb in the science MOT are reported. After the initial MOT phase, atoms in the mixture are optically pumped into the magnetically trappable |F=3,m_F=-3> and |F=1,m_F=-1> states of Cs and Rb (respectively) and loaded into an Ioffe-Pritchard magnetic trap. We demonstrate a novel technique for limiting the interspecies loss rate in the science MOT by spatially separating the two trapped atom clouds, which greatly enhances the number of atoms which can be loaded into the magnetic trap.

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