An atomic beam source for fast loading of a magneto-optical trap under high vacuum

作者：McDowall Peter D^*; Gruenzweig Tzahi; Hilliard Andrew; Andersen Mikkel F

来源：Review of Scientific Instruments, 2012, 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 %26lt; 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.

• 出版日期2012-5