【摘要】 简述了磁选态和光抽运铯束管的工作原理,在频率准确度、短期稳定度、长期稳定度三个方面将两者对频标性能的作用影响进行了计算对比。结果表明磁选态管准确度和长稳较好,短稳有限;光抽运管可使优值系数F增大数倍,短稳有优势,但光频移影响了准确度及长稳,应尽力减小。两者各有长处与不足,未来发展趋势将是一方面继续改进磁选态管,另一方面应发展完善光抽运管。更多还原

【Abstract】 The working principles of the magnetic state-selecting cesium beam tube and the optically pumping cesium beam tube are described in this paper.The magnetic state-selecting tube is compared with the optically pumping one on the frequency-accuracy,the short-term stability and the long-term stability.It shows that the magnetic state-selecting tube has a nice frequency-accuracy and a nice long-term stability,but its short-term stability is a little poor.The optically pumping tube has a nice short-term stability,but with a great light frequency-shift.Both the magnetic state-selecting tube and the optically pumping one have their advantages and shortcomings,and will be improved continuously.更多还原