Title :
Uncertainty evaluation of the PTB primary clocks CS3 and CS4
Author :
Bauch, A. ; Fischer, B. ; Heindorff, T. ; Schroder, R.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
fDate :
June 27 1994-July 1 1994
Abstract :
At the PTB two primary cesium atomic clocks with a vertical atomic beam were constructed and put into operation during the last years. The contributions to the total uncertainty traditionally considered as being of relevance were determined. The observation of the clock data however, has revealed changes in the mean frequency slightly larger than the combined uncertainty of the clocks. This dilemma makes refined studies inevitable.<>
Keywords :
atomic beams; atomic clocks; caesium; measurement standards; CS3; CS4; Cs; Cs primary atomic clocks; PTB primary clocks; clock data; mean frequency; uncertainty; uncertainty evaluation; vertical atomic beam; Atomic beams; Atomic clocks; Atomic layer deposition; Doppler effect; Frequency estimation; Impurities; Magnetic fields; Magnetic shielding; Servomechanisms; Uncertainty;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333419
