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- W1647569087 abstract "Abstract : De Marchi at the National Institute of Standards and Technology (NIST) performed an experiment on Hewlett-Packard cesium (Cs) frequency standards, in which he showed that there exist optimum values of the C-field that make the output frequency insensitive to variations in microwave power. Moreover, and most important, De Marchi demonstrated that the long-term stability of the Cs standard was improved at these optimum values of the C- field. To see if these results could be obtained with standards made by different manufacturers and having different modulation schemes and Cs tube designs, we performed a similar study using a completely automated measurement system on four Cs standards made by two other manufacturers. Our results, similar to those of De Marchi, showed that there are similar optimum C-field settings in these standards; furthermore, they showed that it may be more important to tune the microwave cavity precisely to the center Cs resonance frequency (fo) than it is to set the C-field at an optimum value. The best procedure, of course, is to do both, i.e., tune the cavity to the Cs resonance frequency as well as set an optimum C-field." @default.
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- W1647569087 date "1989-11-01" @default.
- W1647569087 modified "2023-09-24" @default.
- W1647569087 title "Determining optimum C-field settings that minimize output frequency variations in cesium atomic frequency standards" @default.
- W1647569087 hasPublicationYear "1989" @default.
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