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来自脉冲冷原子束的窄线Tm MOT的负载

M Yaushev^1,2, D Mishin^1,2, D Tregubov^1,2

¹P.N. Lebedev Physical Institute, Leninsky Prospekt 53, 119991 Moscow, Russia.

The Review of scientific instruments

|March 31, 2025

概括

我们开发了一种用于冷 (Tm) 原子的脉冲源,使窄线磁光陷 (MOT) 的有效加载成为可能. 这种方法提高了用于光谱实验的原子收集效率.

科学领域:

原子物理原子物理
量子光学是一种量子光学.
激光冷却激光冷却

背景情况:

磁光陷 (MOT) 对原子光谱学至关重要.
对某些原子物种来说,有效地加载MOT是一个挑战.
传统的2D-MOT方案在加载速度和效率方面存在局限性.

研究的目的:

开发一种新的冷 (Tm) 原子脉冲源.
为了提高窄线MOT的装载效率.
为现有的MOT装载技术提供一种多功能替代方案.

主要方法:

一个脉冲冷Tm原子源的构造.
从冷原子束中加载一个窄线MOT.
实施额外的轴向冷却束,以提高MOT捕获速度.
原子束特性 (速度,角度扩散) 的表征.

主要成果:

实现了第一阶段MOT加载率高达10^8原子/s.
产生了冷原子束,平均速度为~10 m/s,角传播为18 mrad.
在5Hz的重复率下生成多达5×10^6个原子的冷原子束.
使用增强捕获速度方法,在第二阶段的MOT中达到10%的加载效率.

结论:

脉冲冷原子源和增强的MOT加载方法提供了显著的改进.
这种方法适用于其他原子物种,如Sr,Yb,Dy和Er.
该技术减少了原子组合准备时间,使得光谱学中的重复率更高.

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