McDowall Peter D, Grünzweig Tzahi, Hilliard Andrew, Andersen Mikkel F
Jack Dodd Centre for Quantum Technology, Department of Physics, University of Otago, New Zealand.
Rev Sci Instrum. 2012 May;83(5):055102. doi: 10.1063/1.4708617.
We report on a directional atomic beam created using an alkali metal dispenser and a nozzle. By applying a high current (15 A) pulse to the dispenser at room temperature we can rapidly heat it to a temperature at which it starts dispensing, avoiding the need for preheating. The atomic beam produced is capable of loading 90% of a magneto-optical trap (MOT) in less than 7 s while maintaining a low vacuum pressure of <10(-11) Torr. The transverse velocity components of the atomic beam are measured to be within typical capture velocities of a rubidium MOT. Finally, we show that the atomic beam can be turned off within 1.8 s.
我们报告了一种使用碱金属分配器和喷嘴产生的定向原子束。在室温下向分配器施加高电流（15 A）脉冲，我们可以迅速将其加热到开始分配的温度，从而无需预热。产生的原子束能够在不到7秒的时间内加载磁光阱（MOT）中90%的原子，同时保持低于10^(-11) 托的低真空压力。测量得到原子束的横向速度分量在铷磁光阱的典型捕获速度范围内。最后，我们证明原子束可以在1.8秒内关闭。
