论文信息 - Apparent Power-Dependent Frequency Shift Due to Collisions in a Cesium Fountain

Apparent Power-Dependent Frequency Shift Due to Collisions in a Cesium Fountain

We describe a situation where a varying collisional frequency shift in cesium fountain primary frequency standards can be misinterpreted as a power-dependent shift. This misinterpretation may affect analyses of fountains test-operated at multiple pi/2 microwave pulse areas. Such tests are typically performed in the search for microwave- and cavity-related systematic frequency biases.

R. Wynands | S. Weyers | K. Szymaniec | W. Chalupczak

[1] R. Wynands,et al. Atomic fountain clocks , 2005 .

[2] G. Dick,et al. Frequency Biases Associated with Distributed Cavity Phase and Microwave Leakage in the Atomic Fountian Primary Frequency Standards IEN-CSF1 and NIST-F1 , 2005 .

[3] P. Rosenbusch,et al. Cold atom clocks and applications , 2005, physics/0502117.

[4] K. Szymaniec,et al. Collisions in a ballistically expanding cloud of cold atoms in an atomic fountain , 2007 .

[5] G. Dick,et al. Power dependence of distributed cavity phase-induced frequency biases in atomic fountain frequency standards , 2005, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[6] R. Wynands,et al. Effects of microwave leakage in caesium clocks: Theoretical and experimental results , 2006, Proceedings of the 20th European Frequency and Time Forum.

[7] R. Wynands,et al. Cancellation of the collisional frequency shift in caesium fountain clocks. , 2007 .

[8] P S Julienne,et al. Collisional frequency shifts in 133Cs fountain clocks. , 2001, Physical review letters.

[9] Gibble,et al. Direct observation of s-wave atomic collisions. , 1995, Physical review letters.

[10] Dai-Hyuk Yu,et al. Power dependence of the frequency bias caused by spurious components in the microwave spectrum in atomic fountains , 2006, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.