利用光诱导解吸和光捕获快速制备超冷钠气体
Fast production of ultracold sodium gases using light--induced desorption and optical trapping
摘要：
在本文中，我们报道了钠的玻色-爱因斯坦凝聚体（BEC）的产生，使用光诱导解吸作为原子源。我们从这个源向MOT中加载了大约2 × 10^7个原子，加载时间常数约为6 s。加载后关闭脱附灯，MOT寿命可保持在27 s左右。我们表明，压力下降了40倍，在不到100毫秒后的消光解吸光，恢复低背景压力蒸发。使用这种技术，在光偶极阱中蒸发6 s后，产生了具有10^4个原子的\na BEC。
英文摘要：
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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