首页|Response optimization of a three-axis sensitive SERF magnetometer for closed-loop operation
Response optimization of a three-axis sensitive SERF magnetometer for closed-loop operation
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Most triaxial-vectorial magnetic field measurements with spin-exchange relaxation free(SERF)atomic magnetometer(AM)are based on the quasi-steady-state solution of the Bloch equation.However,the responding speed of these methods is greatly limited because the frequency of the modulation signal should be slow enough to ensure the validity of the quasi-steady-state solution.In this work,a new model to describe the response of the three-axis sensitive SERF AM with high modulation frequency is presented and verified.The response of alkali-atomic spin to high-frequency modulation field is further investigated by solving the Bloch equation in a modulation-frequency-dependence manner.This solution is well verified by our experiments and can offer a reference for selection of modulation frequencies.The result shows a potential to achieve a SERF AM operating in a geomagnetic field without heavy aluminum shielding when the modulation frequencies are selected properly.
triaxial-vectorial magnetic field measurementspin-exchange relaxation freeatomic magnetome-ter
周原锐、孙永泽、汪茜茜、秦佳男、张雪、王言章
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Key Laboratory of Geophysical Exploration Equipment(Ministry of Education),Jilin University,Changchun 130012,China
College of Instrumentation and Electrical Engineering,Jilin University,Changchun 130012,China
Department of Physics,Johannes Gutenberg-Universitat Mainz,55128 Mainz,Germany
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