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Evaporative Cooling of a Guided Rubidium Atomic Beam

Thierry Lahaye·Z. Wang·G. Reinaudi·S. P. Rath·J. Dalibard·D. Guéry-Odelin
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Abstract

We report on our recent progress in the manipulation and cooling of a magnetically guided, high flux beam of $^{87}{\rm Rb}$ atoms. Typically $7\times 10^9$ atoms per second propagate in a magnetic guide providing a transverse gradient of 800 G/cm, with a temperature $\sim550$ $μ$K, at an initial velocity of 90 cm/s. The atoms are subsequently slowed down to $\sim 60$ cm/s using an upward slope. The relatively high collision rate (5 s$^{-1}$) allows us to start forced evaporative cooling of the beam, leading to a reduction of the beam temperature by a factor of ~4, and a ten-fold increase of the on-axis phase-space density.

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Thierry Lahaye, Z. Wang, G. Reinaudi, S. P. Rath, J. Dalibard, D. Guéry-Odelin. 2005-05-30. Evaporative Cooling of a Guided Rubidium Atomic Beam. https://doi.org/10.1103/physreva.72.033411

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