The Influence of the Operation Magnetic Field Modulation on the Short-Term Frequency Stability of Rubidium Atomic Clock at Magnetic Gradient

The paper presents experimental results on the short-term frequency stability of optically pumped rubidium atomic clock under conditions of operation magnetic field periodic variations and magnetic field gradient. The experiments for the case of lamp optical pumping of rubidium vapor with an isotopic filter were performed. It is noted that a decrease in the field strength and the use of high-quality magnetic shields make it possible to significantly increase the short-term frequency stability of the rubidium atomic clock and reduce the average level of the flicker ceiling of the Allan deviation time dependence at averaging times of 100 s.