Title :
Progress in the LPTF cesium beam frequency standard
Author :
Makdissi, A. ; Berthet, J.-P. ; de Clercq, E.
Author_Institution :
Obs. de Paris, Meudon, France
Abstract :
The present short term stability of our optically pumped frequency standard is /spl sigma//sub y/(/spl tau/)=3.8/spl middot/10/sup -13/ /spl tau//sup - 1/2 /. A great deal of work has been performed in order to reduce the uncertainties of this standard. An example is given with two of them, associated to the second order Doppler effect and to the presence of a microwave field outside the Ramsey cavity.
Keywords :
Doppler shift; atomic beams; atomic clocks; caesium; frequency stability; frequency standards; measurement uncertainty; optical pumping; Allan standard deviation; Cs; Ramsey cavity; TOF dependent shifts; Zeeman sublevel; cesium beam frequency standard; microwave field; microwave leakage effect; microwave spectra; optically pumped frequency standard; second order Doppler effect; short term stability; uncertainties; Frequency estimation; Laser beams; Laser transitions; Masers; Optical beams; Optical pumping; Optical saturation; Pump lasers; Stability; Uncertainty;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699735
