Ultra-stable Hg/sup +/ trapped ion frequency standard

Ultra-stable Hg/sup +/ trapped ion frequency standard
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超稳定 Hg/sup/捕获离子频率标准

DOI:
10.1109/freq.1991.145953
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发表时间:
1991
期刊:
Proceedings of the 45th Annual Symposium on Frequency Control 1991
影响因子:
--
通讯作者:
L. Maleki
L. Maleki
中科院分区:
--
文献类型:
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作者:
J. Prestage;R. Tjoelker;G. Dick;L. Maleki

文献摘要

被引文献

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作者报道了一种基于限制在混合RF/DC线性离子阱中的/sup 199/Hg/sup +/离子的可现场频率标准的发展。这种陷阱允许存储大量的离子,降低了对由RF限制场引起的二阶多普勒效应的敏感性。用于40.5 GHz时钟跃迁的160 MHz宽的原子共振线用于操纵5 MHz晶体振荡器的输出,以获得24000秒平均时间的2*10/sup-15/的稳定性。对于长的平均时间间隔测量是有限的,在现有的氢脉泽频率标准的不稳定性。&lt;<ETX>&gt;
The authors report the development of a fieldable frequency standard based on /sup 199/Hg/sup +/ ions confined in a hybrid RF/DC linear ion trap. This trap permits storage of large numbers of ions with reduced susceptibility to the second-order Doppler effect caused by the RF confining fields. A 160-mHz-wide atomic resonance line for the 40.5-GHz clock transition is used to steer the output of a 5-MHz crystal oscillator to obtain a stability of 2*10/sup -15/ for 24000 second averaging times. For long averaging intervals measurements are limited by instabilities in available hydrogen maser frequency standards.<<ETX>>