Intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing
Intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing
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DOI：
10.1088/1674-1056/25/6/063701
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
J. Huang;X. Yan;C. F. Wu;J. Zhang;Y. Feng;L. J. Wang
中科院分区：
文献类型：
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作者：
J. Huang;X. Yan;C. F. Wu;J. Zhang;Y. Feng;L. J. Wang
本文报道了一种基于轴向独立冷却和推动的二维磁光阱的冷铯原子强源的研究。新设计的源，建议作为2D-HP MOT，使用空心激光束轴向冷却和薄推激光束冷原子束提取。通过推动光束独立地调节，原子通量可以基本上被优化。在2D-HP MOT中获得的原子通量最大值为4.02 × 10^{10}$ atoms/s，与我们实验中的传统2D$^+$ MOT相比增加了60%。此外，与推动功率10 $\mu$W和失谐$0\Gamma $，2D-HP MOT可以产生一个相当强的冷铯原子束与伴随的光移抑制了20倍的幅度。冷铯束的轴向速度分布集中在6.8 m/s，FMHW约为2.8 m/s。研究了原子注量与推进功率和失谐量的关系。实验结果与理论模型吻合较好。
We report our studies on an intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing. The new-designed source, proposed as 2D-HP MOT, uses hollow laser beams for axial cooling and a thin pushing laser beam for cold atomic beam extraction. Regulated independently by the pushing beam, the atomic flux can be substantially optimized. The atomic flux maximum obtained in the 2D-HP MOT is $4.02\times 10^{10}$ atoms/s, increased by 60 percent compared to the traditional 2D$^+$ MOT in our experiment. Moreover, with the pushing power 10 $\mu$W and detuning $0\Gamma$, the 2D-HP MOT can generate a rather intense cold cesium atomic beam with the concomitant light shift suppressed by 20 times in magnitude. The axial velocity distribution of the cold cesium beams centers at 6.8 m/s with a FMHW of about 2.8 m/s. The dependences of the atomic flux on the pushing power and detuning are studied. The experimental results are in good agreement with the theoretical model.