用于激光冷却实验的来自脉冲碱金属分配器的准直单程原子源
Collimated, single-pass atom source from a pulsed alkali metal dispenser for laser-cooling experiments
摘要：
我们发展了一种改进的方案，在< 10^-10 μ m超高真空条件下，从定向碱金属分配器将原子装入磁光阱（MOT）。一个电流驱动的分配器被一个保持在< 0 ℃的冷吸收“护罩”包围，泵送铷原子而不是直接进入MOT。这几乎消除了背景碱原子，并减少了通常与这些设备相关的有害压力上升。该系统可以很好地描述为电流控制、快速切换、双温度热束，并用于加载3 × 10^8个原子的MOT。
英文摘要：
We have developed an improved scheme for loading atoms into a magneto-optical trap (MOT) from a directed alkali metal dispenser in < 10^-10 torr ultra-high vacuum conditions. A current-driven dispenser was surrounded with a cold absorbing "shroud" held at < 0 C, pumping rubidium atoms not directed into the MOT. This nearly eliminates background alkali atoms and reduces the detrimental rise in pressure normally associated with these devices. The system can be well-described as a current-controlled, rapidly-switched, two-temperature thermal beam, and was used to load a MOT with 3 x 10^8 atoms.
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