| Intense source of cold cesium atoms based on a two-dimensional magneto–optical trap with independent axial cooling and pushing |
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| 引用本文： | 黄家强,颜学术,吴晨菲,张建伟,王力军. Intense source of cold cesium atoms based on a two-dimensional magneto–optical trap with independent axial cooling and pushing[J]. 中国物理 B, 2016, 25(6): 63701-063701. DOI: 10.1088/1674-1056/25/6/063701 |
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| 作者姓名： | 黄家强 颜学术 吴晨菲 张建伟 王力军 |
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| 作者单位： | 1.Department of Physics, Tsinghua University, Beijing 100084, China;2.Department of Precision Instrument, Tsinghua University, Beijing 100084, China;3.Joint Institute for Measurement Science (JMI), Tsinghua University, Beijing 100084, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 11304177). |
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| 摘 要： | We report our studies on an intense source of cold cesium atoms based on a two-dimensional(2D) magneto–optical trap(MOT) 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 to extract a cold atomic beam.With the independent pushing beam,the atomic flux can be substantially optimized.The total atomic flux maximum obtained in the 2D-HP MOT is4.02 × 1010atoms/s,increased by 60 percent compared to the traditional 2D+MOT in our experiment.Moreover,with the pushing power 10 μW and detuning 0Γ,the 2D-HP MOT can generate a rather intense atomic beam with the concomitant light shift suppressed by a factor of 20.The axial velocity distribution of the cold cesium beams centers at 6.8 m/s with an FMHW of about 2.8 m/s.The dependences of the atomic flux on the pushing power and detuning are studied in detail.The experimental results are in good agreement with the theoretical model.
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| 收稿时间： | 2015-12-16 |
Intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing |
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| Affiliation: | 1.Department of Physics, Tsinghua University, Beijing 100084, China;2.Department of Precision Instrument, Tsinghua University, Beijing 100084, China;3.Joint Institute for Measurement Science (JMI), Tsinghua University, Beijing 100084, China |
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| Abstract: | We report our studies on an intense source of cold cesium atoms based on a two-dimensional (2D) magneto-optical trap (MOT) 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 to extract a cold atomic beam. With the independent pushing beam, the atomic flux can be substantially optimized. The total atomic flux maximum obtained in the 2D-HP MOT is 4.02×1010 atoms/s, increased by 60 percent compared to the traditional 2D+ MOT in our experiment. Moreover, with the pushing power 10 μW and detuning 0Γ, the 2D-HP MOT can generate a rather intense atomic beam with the concomitant light shift suppressed by a factor of 20. The axial velocity distribution of the cold cesium beams centers at 6.8 m/s with an FMHW of about 2.8 m/s. The dependences of the atomic flux on the pushing power and detuning are studied in detail. The experimental results are in good agreement with the theoretical model. |
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| Keywords: | cold atomic beam magneto-optical trap light shift |
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