开槽管微波腔中微波场分布初步研究

波谱学杂志 ›› 2012, Vol. 29 ›› Issue (1): 86-92.

开槽管微波腔中微波场分布初步研究

康松柏^1,2，李文兵^1,2，钟达¹，梅刚华^1*

1.中国科学院原子频标重点实验室（中国科学院武汉物理与数学研究所），湖北武汉 430071；
2. 中国科学院研究生院，北京 100049

收稿日期:2011-04-13 修回日期:2011-05-17 出版日期:2012-03-05 发布日期:2012-03-05
基金资助:
国家重点基础研究发展计划(973计划)资助项目(2005CB724507).

A Preliminary Study on Field Distribution in a Slotted Tube Cavity

KANG Song-Bai^1,2, LI Wen-Bing^1,2, ZHONG Da¹, MEI Gang-Hua^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).

摘要/Abstract

摘要：

开槽管微波腔已被用于铷原子频标，但是其中的微波场分布尚不清楚. 利用高频结构仿真软件(HFSS)获得了开槽管微波腔内微波场的分布，利用激光—微波双共振方法实现了微波腔场分布的实验测量，所得结果与理论结果一致. 研究结果表明，腔内微波场磁力线呈轴向分布，这表明该种微波腔是适用于原子频标的. 研究结果还表明，腔内微波场存在明显的空间不均匀性，这会导致一些区域的原子不能充分利用，限制原子的钟跃迁信号强度. 因此，现有的开槽管腔结构还有改进的余地.

关键词: 开槽管式微波腔, 微波场分布, 铷原子频标

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

中图分类号:

O455.1

康松柏, 李文兵, 钟达, 梅刚华. 开槽管微波腔中微波场分布初步研究[J]. 波谱学杂志, 2012, 29(1): 86-92.

KANG Song-Bai, LI Wen-Bing, ZHONG Da, MEI Gang-Hua. A Preliminary Study on Field Distribution in a Slotted Tube Cavity[J]. Chinese Journal of Magnetic Resonance, 2012, 29(1): 86-92.

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