霍尔测磁仪的标定

Calibration of the Hall magnetometer

本文报道了使用探头局部恒温的霍尔测磁仪,测量广量程磁谱仪的磁场分布,其输出的霍尔电压长期稳定度好于0.03％。利用核磁共振仪在磁场为0.7—2.1T的范围内进行标定。本文提出的拟合公式可应用到0.7T以下的范围,并对正负磁场区都适合。在标定区计算值与实验值的最大偏差为0.03％,在标定区外(0.7—0.15T)的偏差由0.03％增至0.06％。

The measurement of magnetic field distribution of the wide range magnetic spectrometer is carried out by a magnetometer with a temperature stabilized Hall element which has a long time stability of 0.03%. The magnetometer is calibrated with a NMR meter in the magnetic field range of 0.7-2.1 T. For below the calibrated region a fitting formula is presented. It is applicable to both positive and negative magnetic field regions.