波谱学杂志 ›› 2018, Vol. 35 ›› Issue (1): 128-132.doi: 10.11938/cjmr20172579

• 研究简报 • 上一篇    

一种用于高性能铷频标的大尺寸开槽管微波腔的实现

吕剑锋1,2, 郝强1,2, 王鹏飞1, 赵峰1, 梅刚华1   

  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. 中国科学院大学, 北京 100049
  • 收稿日期:2017-05-08 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: 梅刚华,Tel:027-87197190,E-mail:mei@wipm.ac.cn;赵峰,Tel:027-87198862,E-mail:zf_lucky@wipm.ac.cn. E-mail:mei@wipm.ac.cn;zf_lucky@wipm.ac.cn

A Large-Size Slotted Tube Microwave Cavity for High-Performance Rubidium Atomic Frequency Standard

LV Jian-feng1,2, HAO Qiang1,2, WANG Peng-fei1, ZHAO Feng1, MEI Gang-hua1   

  1. 1. CAS Key Laboratory of Atomic Frequency Standards(Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-05-08 Online:2018-03-05 Published:2018-03-05

摘要: 铷原子频标的频率稳定度指标在很大程度上取决于物理系统所用微波腔的特性.本文设计了一款内径为40 mm的开槽管微波腔,并在此基础上实现了一款铷频标物理系统.计算和实验测量的微波腔内微波场的方向因子分别为0.87和0.91,表明微波场磁力线与量子化轴方向高度平行.测量了物理系统的鉴频斜率和散弹噪声,据此预计这种微波腔可满足设计稳定度优于2×10-13τ-1/2铷频标的需求.

关键词: 铷原子频标, 开槽管微波腔, 方向因子, 频率稳定度

Abstract: The frequency stability of a passive rubidium atomic frequency standard (RAFS) largely depends on the performance of the microwave cavity used in the physics package. In this paper, a large-size slotted tube microwave cavity with an inner diameter of 40 mm, as well as the physics package based on this cavity, were designed and built. Theoretical calculations and experimental results showed that the magnetic lines inside this cavity were highly parallel to the quantization axis. The frequency discrimination slope and the shot noise of the physics package were measured. The results showed that the cavity could be used to realize an RAFS with frequency stability of 2×10-13τ-1/2.

Key words: rubidium atomic frequency standard, slotted-tube microwave cavity, orientation factor, frequency stability

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