Partially ferromagnetic electromagnet for trapping and cooling neutral atoms to quantum degeneracy

Details Partially ferromagnetic electromagnet for trapping and cooling neutral atoms to quantum degeneracy Partially ferromagnetic electromagnet for trapping and cooling neutral atoms to quantum degeneracy

2005-07-06

arxiv.org/abs/cond-mat/0507129v2

Rev. Sci. Instrum. 76, 103104 (2005)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We have developed a compact partially ferromagnetic electromagnet to produce a Ioffe-Pritchard trap for neutral atoms. Our structure permits strong magnetic confinement with low power consumption. Compared to the previous iron-core electromagnet, it allows for easy compensation of remnant fields and very high stability, along with cost-effective realization and compactness. We describe and characterize our apparatus and demonstrate trapping and cooling of Rb 87 atoms to quantum degeneracy. Pure Bose-Einstein condensates containing 10^6 atoms are routinely realized on a half-minute cycle. In addition we test the stability of the magnetic trap by producing atom lasers.

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