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铯原子束频率标准中引起0—0跃迁频移的主要因素是Doppler效应频移和腔相位差频移。减小上述二种频移对减小铯束频标的系统频偏,对提高频率准确度和稳定度起着重大作用。近年来,我们研制的新型六极铯束频标的准确度优于±5×10~(-12),稳定度优于3×10~(-13)/日,重要原因之一就是使用了同轴一圆波导腔作为Ramsey微波激励器。本文是试图对使用同轴一圆波导腔提高铯束频标的准确度和稳定度的几个问题进行分析和研究。
The main factors causing the frequency shift of 0-0 transition in the cesium atomic beam frequency standard are Doppler effect frequency shift and cavity phase shift frequency shift. Reduce the above two kinds of frequency shift to reduce the frequency offset of the cesium beam frequency standard, to improve the frequency accuracy and stability plays a significant role. In recent years, we have developed a new six-pole cesium beam frequency standard accuracy of better than ± 5 × 10 ~ (-12), the stability is better than 3 × 10 ~ (-13) / day, one of the important reasons is the use of the same Shaft-circular waveguide cavity as a Ramsey microwave actuator. This article attempts to analyze and study several problems of using the coaxial circular waveguide cavity to improve the accuracy and stability of the cesium beam frequency standard.