低盲区三轴矢量原子磁力仪的研制

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Development of three-axis vector atomic magnetometer with small dead zone

MIAO Peixian1*，LIU Zhidong¹，CHEN Dayong 2 ，SHI Yanchao 1 YANG Shiyu1，CAI Zhiwei1，YANG Xuhong1

（1. Science and Technology on Vacuum Technology and Physics Laboratory，Lanzhou Institute of Physics，Lanzhou 730030， China; 2. College ofElectronic Engineering，Northwest Minzu University，Lanzhou 73oo3O，China） * Corresponding author，E-mail： miaopeixian@l63.com

Abstract： In order to reduce the requirement of three-axis vector atomic magnetometers for the attitude control range of the motion platform，a scalar pump-probe atomic magnetometer with a smaller dead zone was selected for the vector atomic magnetometer based on the magnetic field rotation-modulation method. The improved vector atomic magnetometer had a smaller dead zone and had the potential to be used on a stationary or slow-moving platform. Firstly，the working principle of the vector atomic magnetometer based on the magnetic field rotation-modulation method was introduced.Secondly，the distribution of dead zones of the vector atomic magnetometers was analyzed when the scalar atomic magnetometer was selected as an Mx type optical pump magnetometer or a pump-probe type atomic magnetometer. Finally，the technical specifications of the three-axis atomic magnetometer with a small dead zone were validated near the geomagnetic field. When the three-axis vector atomic magnetometer measures the vector magnetic field near ，the sensitivity of measuring total fields is less than 1nT/Hz1/2（@0.1Hz） ， the sensitivity of measuring angles is less than ，and the proportion of dead zone in spatial solid angle is less than 12% . The vector magnetometer described in this article has the technical characteristics of dynamic continuous measurement，wide range and small dead zone.

Key words： vector atomic magnetometer; pump-probe; magnetic field rotation-modulation method; dead zone

1引言

原子磁力仪可分为标量磁力仪和矢量磁力仪，由于矢量磁场信息有助于更精确的磁源定位，21世纪以来国内外学者开展了大量与矢量原子磁力仪相关的研究[1-14]。（剩余13912字）