The study of second-order Zeeman shift of the cesium fountain clock NTSC-F1

2016 ◽  
Author(s):  
Xinliang Wang ◽  
Jun Ruan ◽  
Dandan Liu ◽  
Yong Guan ◽  
Junru Shi ◽  
...  
Keyword(s):  
Second Order ◽  
Zeeman Shift

Uncertainty evaluation of the second-order Zeeman shift of a transportable 87Rb atomic fountain clock

2021 ◽  
Vol 19 (12) ◽  
pp. 120201
Author(s):  
Henan Cheng ◽  
Siminda Deng ◽  
Zhen Zhang ◽  
Jingfeng Xiang ◽  
Jingwei Ji ◽  
...  
Keyword(s):  
Second Order ◽  
Uncertainty Evaluation ◽  
Zeeman Shift ◽  
Atomic Fountain

scholarly journals Demonstration of the Systematic Evaluation of an Optical Lattice Clock Using the Drift-Insensitive Self-Comparison Method

2021 ◽  
Vol 11 (3) ◽  
pp. 1206
Author(s):  
Chihua Zhou ◽  
Xiaotong Lu ◽  
Benquan Lu ◽  
Yebing Wang ◽  
Hong Chang
Keyword(s):  
Optical Lattice ◽  
Laser Frequency ◽  
Frequency Offset ◽  
Comparison Method ◽  
Second Order ◽  
Systematic Evaluation ◽  
Zeeman Shift ◽  
Optical Lattice Clock ◽  
Incorrect Measurement ◽  
Comparison Technique

The self-comparison method is a powerful tool in the uncertainty evaluation of optical lattice clocks, but any drifts will cause a frequency offset between the two compared clock loops and thus lead to incorrect measurement result. We propose a drift-insensitive self-comparison method to remove this frequency offset by adjusting the clock detection sequence. We also experimentally demonstrate the validity of this method in a one-dimensional 87Sr optical lattice clock. As the clock laser frequency drift exists, the measured frequency difference between two identical clock loops is (240 ± 34) mHz using the traditional self-comparison method, while it is (−15 ± 16) mHz using the drift-insensitive self-comparison method, indicating that this frequency offset is cancelled within current measurement precision. We further use the drift-insensitive self-comparison technique to measure the collisional shift and the second-order Zeeman shift of our clock and the results show that the fractional collisional shift and the second-order Zeeman shift are 4.54(28) × 10−16 and 5.06(3) × 10−17, respectively.

Elimination of second-order Zeeman shift in thulium optical clock by simultaneous interrogation of two clock transitions

2021 ◽  
Author(s):  
D. Tregubov ◽  
A. Golovizin ◽  
E. Fedorova ◽  
D. Mishin ◽  
D. Provorchenko ◽  
...  
Keyword(s):  
Second Order ◽  
Optical Clock ◽  
Zeeman Shift

Disappearance Voltage Determinations Using a Convergent Beam

1971 ◽  
Vol 29 ◽  
pp. 184-185
Author(s):  
W. L. Bell
Keyword(s):  
Second Order ◽  
Objective Method ◽  
Uniform Thickness ◽  
Rocking Curve ◽  
Crystal Perfection ◽  
Kikuchi Line ◽  
Central Maximum ◽  
Diffraction Patterns ◽  
Convergent Beam ◽  
Beam Technique

Disappearance voltages for second order reflections can be determined experimentally in a variety of ways. The more subjective methods, such as Kikuchi line disappearance and bend contour imaging, involve comparing a series of diffraction patterns or micrographs taken at intervals throughout the disappearance range and selecting that voltage which gives the strongest disappearance effect. The estimated accuracies of these methods are both to within 10 kV, or about 2-4%, of the true disappearance voltage, which is quite sufficient for using these voltages in further calculations. However, it is the necessity of determining this information by comparisons of exposed plates rather than while operating the microscope that detracts from the immediate usefulness of these methods if there is reason to perform experiments at an unknown disappearance voltage.The convergent beam technique for determining the disappearance voltage has been found to be a highly objective method when it is applicable, i.e. when reasonable crystal perfection exists and an area of uniform thickness can be found. The criterion for determining this voltage is that the central maximum disappear from the rocking curve for the second order spot.

Sign in / Sign up

Export Citation Format

Share Document