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Development of JOM-1 Model Overhauser Magnetometer

Overhauser magnetometer is a high sensitivity magnetostatic measuring instrument based on Overhauser effect. It has become a hot research topic in recent years,because it has high performance and is widely used. The working principle and hardware structure of JOM-1 Overhauser magnetometer are given and some key parts such as RF( Radio Frequency) excitation circuit,signal processing circuit,working sequence,noise level and experimental results are introduced. Field tests indicate that JOM-1 Overhauser magnetometer has achieved basic functions such as data collection,display,storage,viewing and so on. 0. 14 n T sensitivity is obtained and initial signal-to-noise ratio can reach 96 ∶ 1,which is three times of the JPM-1 proton precession magnetometer fabricated by our lab.