Distortions of Magnetic Resonances by Additional and Excessive Oscillatory Fields

Lewis, Harry R.; Pery, A.; Quinn, W.E.; Ramsey, Norman F.

doi:10.1103/physrev.107.446

Cited by 9 publications

(1 citation statement)

References 6 publications

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“…According to the old theory [33], which was confirmed experimentally many times, including in atomic fountains [34,35], if the frequency detuning D is larger than both the Rabi frequency of the leakage field b 1 and the Fourier limited spectral width 1/T of the excitation microwave pulse of duration T , which is of the order of the Ramsey time, the ac Zeeman frequency shift of the atomic transition can be calculated as…”

Section: Microwave Power-dependent Shiftsmentioning

confidence: 99%

Accurate rubidium atomic fountain frequency standard

Ovchinnikov¹,

Marra²

2011

Metrologia

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The design, operating parameters and the accuracy evaluation of the NPL Rb atomic fountain are described. The atomic fountain employs a double magneto-optical arrangement that allows a large number of 87Rb atoms to be trapped, a water-cooled temperature-stabilized interrogation region and a high quality factor interrogation cavity. From the uncertainties of measured and calculated systematic frequency shifts, the fractional frequency accuracy is estimated to be 3.7 × 10−16. The fractional frequency stability, limited predominantly by noise in the local oscillator, is measured to be 7 × 10−16 after one day of averaging. Based on the proposed quasi-continuous regime of operation of the fountain, the accuracy of the Rb standard of 5 × 10−17 reachable in two days of averaging is predicted.

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Section: Microwave Power-dependent Shiftsmentioning

confidence: 99%