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

We have developed a compact partially ferromagnetic electromagnet to produce an Ioffe-Pritchard trap for neutral atoms. Our structure permits strong magnetic confinement with low power consumption. Compared to the previous iron-core electromagnet [ B. Desruelle , V. Boyer , P. Bouyer , G. Birkl , M....

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Bibliographic Details
Published in:Review of scientific instruments 2005-10, Vol.76 (10), p.103104-103104-7
Main Authors: Fauquembergue, M., Riou, J-F., Guerin, W., Rangwala, S., Moron, F., Villing, A., Le Coq, Y., Bouyer, P., Aspect, A., Lécrivain, M.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
Condensed Matter
COOLING
ELECTROMAGNETS
FERROMAGNETIC MATERIALS
IRON
MAGNETIC CONFINEMENT
Optics
Other
Physics
RADIATION PRESSURE
RUBIDIUM
RUBIDIUM 87
STABILITY
TRAPPING
TRAPS
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Summary:We have developed a compact partially ferromagnetic electromagnet to produce an Ioffe-Pritchard trap for neutral atoms. Our structure permits strong magnetic confinement with low power consumption. Compared to the previous iron-core electromagnet [ B. Desruelle , V. Boyer , P. Bouyer , G. Birkl , M. Lécrivain , F. Alves , C. Westbrook , and A. Aspect , Eur. Phys. J. D 1 , 255 ( 1998 ) ], 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.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2090407