原子磁强计标定测试教学实验平台构建

Construction of experimental platform for calibrating and testing atomic magnetometer

原子磁强计是近年来发展非常迅速的一种量子传感器,它利用激光检测碱金属原子自旋在磁场中的拉莫尔进动从而实现磁场测量,可达到fT(10^(-15)T)级甚至更高的测量灵敏度。为了解决学生对于原子磁强计工作原理以及极弱磁场量级理解较为困难等问题,搭建了原子磁强计标定测试教学实验平台。该平台主要由多层坡莫合金磁屏蔽桶、三轴匀强磁场线圈、高精度电流源、磁通门磁强计、原子磁强计以及上位机组成。该平台可以强化学生的实验动手能力,同时也为研究生和本科生的相关课程提供了有力支撑。

As a kind of quantum sensor,the atomic magnetometer has been developing rapidly in recent years.According to detection the Lamor precession of alkali-metal atoms spin in the magnetic field,the atomic magnetometer can achieve an ultra-high sensitivity on the order of 1 fT or even better.To solve the problem that students are hard to understand the principle of the atomic magnetometer and the magnitude of ultra-weak magnetic field,an experimental platform for calibrating and testing atomic magnetometer is constructed.The experimental platform consists of a multilayered magnetic shielding,a triaxial magnetic field coil,a high-precision current source,a fluxgate,an atomic magnetometer and a computer.Through the operation,students' practical abilities can be greatly enhanced.Meanwhile,this experimental platform can also help the related courses for both graduate students and undergraduate students.