Title :
Progress at CSIRO Australia towards a microwave frequency standard based on trapped, laser-cooled 171Yb+ ions
Author :
Fisk, P.T.H. ; Lawn, M.A. ; Coles, C.
Author_Institution :
Nat. Meas. Lab., Lindfield, NSW, Australia
Abstract :
The authors report preliminary results of precision microwave-optical double resonance spectroscopy on buffer gas cooled 171Yb+ ions confined in a linear Paul trap as a microwave frequency standard at 12.6 GHz. They also report laser cooling of trapped 171Yb+ ions. Temperatures below 1 K have been achieved, and evidence for a phase transition to a crystal-like state has been found. This temperature is sufficiently low to reduce the fractional second-order Doppler shift of the microwave resonance to below 10-14
Keywords :
Doppler shift; atomic clocks; frequency measurement; measurement standards; microwave measurement; microwave-optical double resonance; particle traps; radiation pressure; ytterbium; 1 K; 12.6 GHz; Yb; buffer gas cooled 171Yb+ ions; fractional second-order Doppler shift; laser cooling; linear Paul trap; microwave frequency standard; microwave resonance; phase transition; precision microwave-optical double resonance spectroscopy; trapped 171Yb+ ions; Australia; Cooling; Doppler shift; Gas lasers; Laser transitions; Masers; Microwave frequencies; Resonance; Spectroscopy; Temperature;
Conference_Titel :
Frequency Control Symposium, 1993. 47th., Proceedings of the 1993 IEEE International
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-0905-7
DOI :
10.1109/FREQ.1993.367389
