摘要
本文介绍了上海天文台实验室型铯束频标的改进工作,主要有: 采用单根波导构成的低Q的U形微波腔取代原来九段波导组合的腔结构,把能态选举器由电磁铁改为永久磁铁,新研制了铯炉准直器和检测器,改善了导轨的支撑结构,调整了C场结构,改善了束管的真空状况;改进了装调和测试方法;研制了脉冲测速装置。同时,文章也给出了改进后铯束频标的初步测试结果,小时稳定度由6×10-13提高到3×10-13,准确度由2×10-12提高到6.5×10-13。其他指标也都相应有所改善。
This paper introduce the improvements of the laboratory cesium beam frequence standard at Shanghai Observatory since 1985. These include use of single U-type microwave cavity instead of nine pieces wavequides assembled U-type cavity; change of the state selector from electromagnet into permanent magnet; development of new cesium oven col-limator and detector; improvement of the support of the slideway: adjustment of the C field structure: improvement of the way of assembly and test; development of the device of the measuring velocity with the pulse. The preliminary measured results are 3 × 10-13/ hour of stability and 6.5×10-13 of accuracy. Other performances also have improved.
出处
《中国科学院上海天文台年刊》
1989年第10期236-242,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
