摘要
保持扫场和垂直磁场合成的叠加磁场大小一定,定量研究了地磁场的垂直分量抵消不同时叠加磁场方向变化角度Δθ对光抽运信号幅度的影响.结果表明:光抽运信号幅度随叠加磁场方向变化角度Δθ的增大而增大,当Δθ=180°时,即地磁场的垂直分量完全抵消时,光抽运信号幅度最大,并用量子理论的观点解释了这一规律.
The influence of superimposed magnetic field on the amplitude of optical pumping signal was studied quantitatively with the direction of the superimposed magnetic field changed when the vertical component of the geomagnetic field wasn＇t completely offset while keeping the superimposed magnetic field formed by modulation field and the vertical magnetic field constant. Experimental results showed that optical pumping signal amplitude increased when superimposed magnetic field direction change △θ increased, When △θ：180°, namely the vertical component of geomagnetic field was completely offset, the optical pumping signal amplitude was the biggest. This rule was explained from the view of quantum theory.
出处
《物理实验》
2015年第2期5-7,17,共4页
Physics Experimentation
基金
北京科技大学研究型教学示范课建设项目(No.KC2014YJX30)
北京科技大学教育教学改革与研究项目(No.JG2012M39
No.JG2012M57)
关键词
光抽运
扫场幅度
垂直磁场
optical pumping
amplitude of modulation field
vertical magnetic field
