Fast production of ultracold sodium gases using light--induced desorption and optical trapping

Abstract

In this paper, we report on the production of a Bose--Einstein condensate (BEC) of sodium using light--induced desorption as an atomic source. We load about 2X10^7 atoms in a MOT from this source with a ~6 s loading time constant. The MOT lifetime can be kept around 27 s by turning off the desorbing light after loading. We show that the pressure drops down by a factor of 40 in less than 100 ms after the extinction of the desorbing light, restoring the low background pressure for evaporation. Using this technique, a \na BEC with 10^4 atoms is produced after a 6 s evaporation in an optical dipole trap.

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• Overlapping Bose-Einstein Condensates of ${}^{23}$Na and ${}^{133}$Cs
• Light-induced atomic desorption of lithium
• Microscopic theory of phase transitions in a critical region
• Alkali vapor pressure modulation on the 100ms scale in a single-cell vacuum system for cold atom experiments
• Microscopic theory of a phase transition in a critical region: Bose-Einstein condensation in an interacting gas
• Efficiency of photodesorption of Rb atoms collected on polymer organic film in vapor-cell
• Efficient production of sodium Bose-Einstein condensates in a hybrid trap