Evaporative Cooling of a Guided Rubidium Atomic Beam

Abstract

We report on our recent progress in the manipulation and cooling of a magnetically guided, high flux beam of ${}^{87}\mathrm{Rb}$ 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 $\sim 550$ $\mu$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.

10 pages, 8 figures

References in corpus (6)

• A Storage Ring for Neutral Atoms
• Atom laser divergence
• Realization of a magnetically guided atomic beam in the collisional regime
• Loading of a cold atomic beam into a magnetic guide
• Propagation of guided cold atoms
• Discrete-step evaporation of an atomic beam

Cited by in corpus (20)

• Laser cooling to quantum degeneracy
• Continuous Bose-Einstein condensation
• A pumped atom laser
• Beam quality of a non-ideal atom laser
• Continuous guided strontium beam with high phase-space density
• Thermalization and Bose-Einstein condensation of quantum light in bulk nonlinear media
• Thermalization in mixtures of ultracold gases
• Transport of Atom Packets in a Train of Ioffe-Pritchard Traps
• A moving magnetic mirror to slow down a bunch of atoms
• Evaporation of an atomic beam on a material surface
• Continuous cavity-QED with an atomic beam
• Kinetics of the evaporative cooling of an atomic beam
• An Intense, Continuous Cold Atom Source
• Evaporation limited loading of an atom trap
• Phase space manipulations of many-body wavefunctions
• A continuously pumped reservoir of ultracold atoms
• Pressure-Driven Evaporative Cooling in Atom Guides
• Spatio-temporal thermalization and adiabatic cooling of guided light waves
• A Maxwell's demon in the generation of an intense and slow guided beam
• Spatio-temporal equilibrium thermodynamics of guided optical waves at positive and negative temperatures