Ultra-Slow Atomic Beam Generation by Velocity Selective Resonance
MA Hong-Yu1,2, CHENG Hua-Dong1, WANG Yu-Zhu1, LIU Liang1, METCALF Harold1
1Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 1000493Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA
Ultra-Slow Atomic Beam Generation by Velocity Selective Resonance
MA Hong-Yu1,2;CHENG Hua-Dong1;WANG Yu-Zhu1; LIU Liang1;METCALF Harold1
1Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 1000493Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA
摘要We describe a method to generate an ultra-slow atomic beam by velocity selective resonance (VSR). A VSR experiment on a metastable helium beam in a magnetic field is presented and the results show that the transverse velocity of the deflected beam can be cooled and precisely controlled to less than the recoil velocity, depending on the magnitude of the magnetic field. We extend this idea to a cold atomic cloud to produce an ultra-slow 87Rb beam that can be used as a source of an atomic fountain clock or a space clock.
Abstract：We describe a method to generate an ultra-slow atomic beam by velocity selective resonance (VSR). A VSR experiment on a metastable helium beam in a magnetic field is presented and the results show that the transverse velocity of the deflected beam can be cooled and precisely controlled to less than the recoil velocity, depending on the magnitude of the magnetic field. We extend this idea to a cold atomic cloud to produce an ultra-slow 87Rb beam that can be used as a source of an atomic fountain clock or a space clock.
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2008, Vol. 25 
