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) level.
Jefferts
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Heavner
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Donley
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EA
Parker
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