Continuously transferring cold atoms in caesium double magneto-optical trap
Yan Shu-Bin(闫树斌), Geng Tao(耿涛), Zhang Tian-Cai(张天才), and Wang Jun-Min(王军民)†
a State Key Laboratory of Quantum Optics and Quantum Optics Devices, and Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China; b State Key Laboratory of Quantum Optics and Quantum Optics Devices, and Institute of Opto-Electronics,Shanxi University, Taiyuan 030006, China
Abstract We have established a caesium double magneto-optical trap (MOT) system for cavity-QED experiment, and demonstrated the continuous transfer of cold caesium atoms from the vapour-cell MOT with a pressure of ～ 1×10-6 Pa to the ultra-high-vacuum (UHV) MOT with a pressure of ～ 8×10-8 Pa via a focused continuous-wave transfer laser beam. The effect of frequency detuning as well as the intensity of the transfer beam is systematically investigated, which makes the transverse cooling adequate before the atoms leak out of the vapour-cell MOT to reduce divergence of the cold atomic beam. The typical cold atomic flux got from vapour-cell MOT is ～2×107 atoms/s. About 5×106 caesium atoms are recaptured in the UHV MOT.
Received: 04 July 2005
Revised: 24 April 2006
Accepted manuscript online:
(Mechanical effects of light on atoms, molecules, and ions)
Fund: Project supported by the Natural
Science Foundation of China (Grant Nos 60578018 10434080, and 10374062),
the Sino-Russia Joint Project (NSFC-RFBR), by the Key Scientific Project
of the Education Ministry of China (Grant No 204019), the Cultivation Fund
of the Key Scientific and Technical Innovation Project (Grant No 705010) and
the Program for Innovative Research Team in University (IRT0516) from the Education
Ministry of China，and also by the Research Funds for Youth Academic Leaders of Shanxi Province.
Cite this article:
Yan Shu-Bin(闫树斌), Geng Tao(耿涛), Zhang Tian-Cai(张天才), and Wang Jun-Min(王军民) Continuously transferring cold atoms in caesium double magneto-optical trap 2006 Chinese Physics 15 1746
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