Chinese Journal of Magnetic Resonance ›› 2012, Vol. 29 ›› Issue (1): 86-92.

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A Preliminary Study on Field Distribution in a Slotted Tube Cavity

 KANG Song-Bai1,2, LI Wen-Bing1,2, ZHONG Da1, MEI Gang-Hua1*   

  1. 1. Key Laboratory of Atom Frequency Standard of the Chinese Academy of Sciences (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-04-13 Revised:2011-05-17 Online:2012-03-05 Published:2012-03-05
  • Supported by:

    国家重点基础研究发展计划(973计划)资助项目(2005CB724507).

Abstract:

Slotted tube cavity has been used in rubidium atomic frequency standards, but the microwave field distribution inside the cavity is unknown. Recently we calculated the microwave field distribution inside the cavity using high frequency structure simulation software (HFSS), and measured the field distribution experimentally with the optical-microwave double resonance method. The theoretical and experimental results were found consistent with each other. The results showed that magnetic lines of the microwave field lay along the cavity axis, impling that the cavity is suitable for applications in atomic frequency standards. The results also showed that the field distribution is spatially inhomogeneous, suggesting that the cavity needs to be improved further, since field inhomogeneity could affect the signal intensity of atomic clock transition.

Key words: slotted tube cavity, microwave field distribution, rubidium atomic frequency standard

CLC Number: