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PROPOSED LASER-COOLkD 87RUBIDIUM LOCAL OSCILLATOR

Steven R. Jefferts, D. Kujundzic

Published Jan 1, 2003• 0 citations
OpenAlex

Abstract

A schematic diagram (not to scale) of the device is shown in Fig. 1. The basic idea of a laser-cooled beam-based atomic clock is not new and the device described here has many similarities to as well as significant differences from a device first described by Buell and Jaduszliwer [ 11. The low-velocity intense-source [LVIS] of

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We experimentally study the use of two-dimensional magneto-optical trapping (2D-MOT) for the generation of slow beams of cold atoms out of a vapor cell. A particularly high flux of $9\ifmmode\times\else\texttimes\fi{}{10}^{9}$ rubidium atoms/s at a mean velocity of 8 m/s is obtained using a combination of magneto-optical trapping in two dimensions and Doppler cooling in the third dimension $({2\mathrm{D}}^{+}\ensuremath{-}\mathrm{MOT}).$ The resulting width of the velocity distribution is 3.3 m/s [full width at half maximum (FWHM)] with a beam divergence of 43 mrad (FWHM). We investigate the total flux as a function of vapor cell pressure and determine the velocity distribution of our slow atom sources. For comparison, we also realized a low-velocity intense source (LVIS), first reported by Lu et al. [Phys. Rev. Lett. 77, 3331 (1996)]. We find that the ${2\mathrm{D}}^{+}\ensuremath{-}\mathrm{MOT}$ yields a significantly higher flux than the LVIS, even when used with an order of magnitude less laser power.