2019/09/10 by Qian Wang, Ning Zhang, Wang, Qian +5
Decision Sciences · Physics and Astronomy · #Advanced Frequency and Time Standards #FOS: Physical sciences #Quantum Physics (quant-ph) #Radioactive Decay and Measurement Techniques #Scientific Measurement and Uncertainty Evaluation
paper · pdf · doi:10.48550/arxiv.1909.04218
openalex publication_date 2019/09/10 · openalex created_date 2019/09/19 · openalex updated_date 2026/07/28
Precise measurement of frequency sensitivity coefficients (FSCs) of some physical effects contributing to uncertainty is an important work in type-B uncertainty (uB) evaluation of atomic frequency standards. We proposed a method based on statistical correlation of noise to measure FSCs and evaluate uB for atomic frequency standards, and giving a full statistical expression of FSC as KI=COVA(y,xI)/(sigma(xI))2 , where y and xI are fractional frequency of atomic frequency standards and noise independent variable of Ith physical effects, respectively. The confidence value and the effect of time interval have also been discussed. Except for theoretical derivation, the method also has been validated by numerical simulation and demonstration experiments. Comparing with standard method, the statistical correlation of noise method combines uB evaluation with type-A uncertainty (uA), measures FSCs not by special experiments, but from the monitoring data when the device is running. It not only gives a criterion to test the standard method, but also can evaluate many effects at the same time when the device is operating. The method can be extended to other precision measurement fields and is available to comprehend the physical effectiveness of the least square method.