Transverse cooling of a cesium atomic beam

Jeng-Rong Yeh

William D. Phillips, John V. Prodan, Harold J. Metcalf

Jeng-Rong Yeh, Barbara M. Hoeling, R. J. Knize

We demonstrate the laser cooling of an alkali atomic beam using the D1 transition. Stark-effect frequency tuning is used to compensate the Doppler shift. A cesium beam as slow as 20 m/sec has been obtained. We also demonstrate the simultaneous transverse and longitudinal cooling in the deceleration region before the atoms reach their final velocity. This technique could be used to develop a cold atomic beam with high intensity.

P. Pillet, Jia Yu, J. Djemaa +1 more

We have transversally compressed a monokinetic cesium atomic beam in a 2D magneto‐optical trap (MOT), also called a funnel, on the F=4→F’=5 transition of the cesium D2 line. The longitudinal cooling is obtained by frequency‐chirping. Preliminary results show a final diameter of about 50–100 μm with a density of a few 108 atoms/cm3 for slowed atoms. The density is enhanced by a preliminary orientation of the atoms inside the trap.

Emmanuel Mandonnet, Anna Minguzzi, Ralph Dum +3 more

N. Castagna, Giovanni Di Domenico, G. Dudle +5 more

In this article we report on the first use of degenerate Raman sideband cooling for the collimation of a continuous beam of cold cesium atoms in a fountain geometry. Using this cooling technique we have reduced the atomic beam transverse temperature from 60 K to 1.6 K in a few milliseconds. We present experimental results and future directions that we will investigate.