Title :
The progress of cesium fountain clock at NIM
Author :
Pingwei Lin ; Mingshou Li ; Tianchu Li ; Ping Wang ; Weiliang Chen ; Nianfeng Liu ; Yige Lin
Author_Institution :
Nat. Inst. of Metrol. (NIM), Beijing, China
Abstract :
NIM4 cesium fountain clock has been operating stably and sub-continually for more than 2 years. We in this paper present the improvements of NIM4 clock in 2004-2005 and most recent evaluation for its systematic frequency deviations during 7-8,2005 resulted an uncertainty of 5E-15. We also report the construction of NIM5 movable cesium fountain clock at NIM.
Keywords :
atomic clocks; caesium; NIM4 clock; NIM5 movable cesium fountain clock; National Institute of Metrology; systematic frequency deviations; Atomic beams; Cavity resonators; Clocks; Laser beams; Magnetic noise; Magnetic shielding; Masers;
Conference_Titel :
Frequency and Time Forum (EFTF), 2006 20th European
Conference_Location :
Braunschweig
Print_ISBN :
978-1-4673-2642-1
