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Chin. Phys. B, 2016, Vol. 25(6): 063701    DOI: 10.1088/1674-1056/25/6/063701
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing

Jia-Qiang Huang(黄家强)1,3, Xue-Shu Yan(颜学术)2,3, Chen-Fei Wu(吴晨菲)1,3, Jian-Wei Zhang(张建伟)2,3, Li-Jun Wang(王力军)1,2,3
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
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.

Keywords:  cold atomic beam      magneto-optical trap      light shift  
Received:  16 December 2015      Revised:  15 January 2016      Accepted manuscript online: 
PACS:  37.10.Gh (Atom traps and guides)  
  37.20.+j (Atomic and molecular beam sources and techniques)  
  37.10.De (Atom cooling methods)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 11304177).

Corresponding Authors:  Li-Jun Wang     E-mail:  lwan@tsinghua.edu.cn

Cite this article: 

Jia-Qiang Huang(黄家强), Xue-Shu Yan(颜学术), Chen-Fei Wu(吴晨菲), Jian-Wei Zhang(张建伟), Li-Jun Wang(王力军) Intense source of cold cesium atoms based on a two-dimensional magneto-optical trap with independent axial cooling and pushing 2016 Chin. Phys. B 25 063701

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