A cold 87Rb atomic beam

doi:10.1088/1674-1056/20/12/126701

中国物理B ›› 2011, Vol. 20 ›› Issue (12): 126701-126701.doi: 10.1088/1674-1056/20/12/126701

A cold ⁸⁷Rb atomic beam

张文栋¹, 王晓佳², 薛洪波³, 周兆英³, 冯焱颖⁴

(1)Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China; (2)Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China;State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Me; (3)State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China; (4)State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China;Joint Institute of Measurement Science (JMI), National Institute of Metrologia-Tsingh

收稿日期:2011-06-29 修回日期:2011-09-24 出版日期:2011-12-15 发布日期:2011-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50775127), the Major State Basic Research Development Program of China (Grant No. 2010CB922901), and the Independent Research Projects of Tsinghua University, China (Grant No. 2009THZ06).

A cold ⁸⁷Rb atomic beam

Wang Xiao-Jia(王晓佳)^a)b), Feng Yan-Ying(冯焱颖)^b)c)†, Xue Hong-Bo(薛洪波)^b), Zhou Zhao-Ying(周兆英)^b), and Zhang Wen-Dong(张文栋)^a)

^a Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China; ^b State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China; ^c Joint Institute of Measurement Science (JMI), National Institute of Metrologia–Tsinghua University, Beijing 100084, China

Received:2011-06-29 Revised:2011-09-24 Online:2011-12-15 Published:2011-12-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50775127), the Major State Basic Research Development Program of China (Grant No. 2010CB922901), and the Independent Research Projects of Tsinghua University, China (Grant No. 2009THZ06).

摘要/Abstract

摘要： We demonstrate an experimental setup for the production of a beam source of cold ⁸⁷Rb atoms. The atoms are extracted from a trapped cold atomic cloud in an unbalanced three-dimensional magneto-optical trap. Via a radiation pressure difference generated by a specially designed leak tunnel along one trapping laser beam, the atoms are pushed out continuously with low velocities and a high flux. The most-probable velocity in the beam is varied from 9 m/s to 19 m/s by varying the detuning of the trapping laser beams in the magneto-optical trap and the flux can be tuned up to 4×10⁹ s^-1 by increasing the intensity of the trapping beams. We also present a simple model for describing the dependence of the beam performance on the magneto-optical trap trapping laser intensity and the detuning.

关键词: continuous atomic beam, unbalanced three-dimensional magneto-optical trap, radiation pressure difference, laser cooling and trapping

Abstract: We demonstrate an experimental setup for the production of a beam source of cold ⁸⁷Rb atoms. The atoms are extracted from a trapped cold atomic cloud in an unbalanced three-dimensional magneto-optical trap. Via a radiation pressure difference generated by a specially designed leak tunnel along one trapping laser beam, the atoms are pushed out continuously with low velocities and a high flux. The most-probable velocity in the beam is varied from 9 m/s to 19 m/s by varying the detuning of the trapping laser beams in the magneto-optical trap and the flux can be tuned up to 4×10⁹ s^-1 by increasing the intensity of the trapping beams. We also present a simple model for describing the dependence of the beam performance on the magneto-optical trap trapping laser intensity and the detuning.

Key words: continuous atomic beam, unbalanced three-dimensional magneto-optical trap, radiation pressure difference, laser cooling and trapping

中图分类号: (Ultracold gases, trapped gases)

67.85.-d

王晓佳, 冯焱颖, 薛洪波, 周兆英, 张文栋. A cold ⁸⁷Rb atomic beam[J]. 中国物理B, 2011, 20(12): 126701-126701.

Wang Xiao-Jia(王晓佳), Feng Yan-Ying(冯焱颖), Xue Hong-Bo(薛洪波), Zhou Zhao-Ying(周兆英), and Zhang Wen-Dong(张文栋) . A cold ⁸⁷Rb atomic beam[J]. Chin. Phys. B, 2011, 20(12): 126701-126701.

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A cold ⁸⁷Rb atomic beam

A cold ⁸⁷Rb atomic beam

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