Frequency Biases Associated with Distributed Cavity Phase and Microwave Leakage in the Atomic Fountain Primary Frequency Standards Ien-csf1 and Nist-f1
نویسندگان
چکیده
We show that the frequency bias caused by distributed cavity phase has a strong dependence on microwave power. We also show that frequency biases associated with microwave leakage have distinct signatures in their dependence on microwave power and the physical location of the leakage interaction with the atom.
منابع مشابه
Measurement of dynamic end-to-end cavity phase shifts in cesium-fountain frequency standards.
We have measured a previously unobserved systematic frequency shift in our cesium-fountain frequency standard, NIST-F1. This shift, predicted theoretically previously, mimics the well-known end-to-end phase shift in atomic beam standards when synchronous thermal transients are present. Detuning the microwave cavity several megahertz from resonance reduces this effect to the deltaf/f = 1o(-16) l...
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The National Institute of Standards and Technology operates a cesium fountain primary frequency standard, NIST-F1, which has been contributing to International Atomic Time (TAI) since 1999. During the intervening 11 years, we have improved NIST-F1 so that the uncertainty is currently 16 0 3 10 , f f dominated by uncertainty in the blackbody-radiationinduced frequency shift. In order to ...
متن کاملFirst accuracy evaluation of NIST-F2
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متن کاملAccuracy evaluation of NIST-F1
The evaluation procedure of a new laser-cooled caesium fountain primary frequency standard developed at the National Institute of Standards and Technology (NIST) is described. The new standard, NIST-F1, is described in some detail and typical operational parameters are discussed. Systematic frequency biases for which corrections are made – second-order Zeeman shift, black-body radiation shift, ...
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تاریخ انتشار 2006