Fast long-distance transport of cold cesium atoms

Subrecoil Raman spectroscopy of cold cesium atoms

We describe and characterize a setup for subrecoil stimulated Raman spectroscopy of cold cesium atoms. We study in particular the performances of a method designed to active control and stabilization of the magnetic fields across a cold-atom cloud inside a small vacuum cell. The performance of the setup is monitored by copropagative-beam stimulated Raman spectroscopy of a cold cesium sample. Th...

Population-grating transfer in cold cesium atoms

Optical-pumping-induced population-grating transfer between hyperfine levels of the cesium D2 line is observed through four-wave mixing in a sample of cold atoms. Diffraction efficiencies of order of 1% have been measured for a large range of angular apertures. We have studied the angular dependence of the diffracted signal in the limit of small atomic velocities and discussed its application f...

Quantum Chaos with Cold Cesium Atoms

Magnetic transport of trapped cold atoms over a large distance

We report the transport of magnetically trapped cold atoms over a large distance. Atoms are captured in a magneto-optical trap ~MOT! and loaded into a magnetic quadrupole trap. The quadrupole potential is then moved over a distance of 33 cm into an ultra-high-vacuum ~UHV! chamber using a chain of quadrupole coils. By running suitable currents through the quadrupole coil pairs the trapping geome...

Thermalization of fast cesium 5D3/2 atoms in collisions with ground-state cesium atoms

We have investigated collisions involving fast, excited Cs atoms produced by photodissociating Cs2 molecules with a pulsed dye laser. The velocities of the atoms in the 5D state formed by the process Cs2sX Sg d+"vpump→Cs2→Css5Dd+Css6Sd are much greater than typical thermal velocities associated with the cell temperature. Using a narrow-band cw probe laser to observe the increased Doppler broade...