摘要
面向深空磁场探测应用的矢量原子磁力仪,不仅需要在弱场下具备较高的灵敏度,还需要具有长期准确测量能力。故需要对矢量原子磁力仪在近零场下的灵敏度和线性度,尤其是准确度方面的性能指标进行地面测试标定。由于目前国家标准计量机构暂时没有可对微弱磁场强度下的磁力仪进行直接测试标定的装置,故提出了一种近零场下间接的测试标定装置和方法。在磁屏蔽筒内利用经过计量标定的CPT原子磁力仪对磁场发生线圈进行标定,通过标定过的线圈产生微弱人工磁场,结合零点旋转测试标定方法,实现对磁力仪准确度的测试标定。完成了近零场高精度原子磁力仪传感器的测试标定和不确定度分析,在±5 nT量程范围内线性度为0.03%,零点合成不确定度为12.90 pT,测量值合成不确定度为15.80 pT。
Vector atomic magnetometers for deep space magnetic field detection applications not only need to have high sensitivity in weak fields,but also need to have long-term accurate measurement capabilities.Therefore,it is necessary to test and calibrate the sensitivity and linearity of the vector atomic magnetometer in the near zero field,especially the performance of accuracy.At present,there is no device that can directly test and calibrate the magnetometer under weak magnetic field in the national standards and metrology institution.An indirect test and calibration device and method under near zero field is proposed.In the magnetic shielding cylinder,the magnetic field generating coil is calibrated by the calibrated CPT atomic magnetometer.The calibrated coil generates a weak artificial magnetic field.Combined with the zero-point rotation test calibration method,the accuracy of the magnetometer is calibrated.The test calibration and uncertainty analysis of the near zero-field high precision atomic magnetometer sensor are completed.The linearity within the±5 nT range is 0.03%,the zero-point uncertainty is 12.90 pT,and the accuracy is 15.80 pT.
作者
吴爽
薛洪波
伏吉庆
宋伟
陶然
闵泽文
张伟
王劲东
李晖
李磊
WU Shuang;XUE Hongbo;FU Jiqing;SONG Wei;TAO Ran;MIN Zewen;ZHANG Wei;WANG Jindong;LI Hui;LI Lei(State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Solar Activity and Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Science,Beijing 100049,China;National Institute of Metrology,Beijing 100029,China)
出处
《计量学报》
北大核心
2025年第1期80-86,共7页
Acta Metrologica Sinica
基金
民用航天预先研究资助项目(D030202)
中国科学院青年创新促进会(2018181)。
关键词
磁学计量
矢量原子磁力仪
近零场
测试标定
线性度
不确定度
magnetic metrology
vector atomic magnetometer
near zero-field
test and calibration
linearity
uncertainty analysis
