Title :
Further investigation of a prototype microwave frequency standard based on trapped 171Yb+ ions
Author :
Sellars, Matthew J. ; Fisk, Peter T H ; Lawn, Malcolm A. ; Coles, Colin
Author_Institution :
Div. of Appl. Phys., CSIRO, Sydney, NSW, Australia
fDate :
31 May-2 Jun 1995
Abstract :
The compare the frequency of the 171Yb+ 12.6 GHz MF=0→0 ground state hyperfine `clock´ transition in buffer gas-cooled ion clouds confined in two similar, but not identical, lineal Paul traps. After correction for the known differences between the two ion traps, including significantly different second-order Doppler shifts, the frequencies agree within an uncertainty of less than 2 parts in 1013. The frequency of the clock transition in an isolated ion at zero temperature, velocity, electric field and magnetic field, was found to be 12 642 812 118.468±0.0016 Hz
Keywords :
Doppler shift; atomic clocks; frequency measurement; ground states; hyperfine structure; measurement standards; microwave measurement; particle traps; positive ions; trapped ions; ytterbium; 12.6 GHz; 171Yb+ ions; Doppler shifts; Yb; buffer gas-cooled ion clouds; ground state hyperfine clock transitions; ion trap; lineal Paul trap; microwave frequency standard; Clocks; Clouds; Doppler shift; Frequency measurement; Magnetic confinement; Magnetic field measurement; Prototypes; Radio frequency; Stationary state; Temperature;
Conference_Titel :
Frequency Control Symposium, 1995. 49th., Proceedings of the 1995 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-2500-1
DOI :
10.1109/FREQ.1995.483884
