NO_2分子Faraday效应磁强计  

Molecular Magnetometer Based on Faraday Effect of Gaseous NO_2

作　　者：韩良恺[1] 杨晓华[2] 龚天林[1] 陈扬骎[2] 

机构地区：[1]南通师范学院物理系,江苏南通226007 [2]华东师范大学光谱学与波谱学教育部重点实验室,上海200062

出　　处：《华南理工大学学报（自然科学版）》2003年第9期35-39,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (10 174 0 2 0 ;10 2 0 4 0 0 7) ;江苏省高校自然科学基金资助项目(0 3KJB14 0 10 5 )

摘　　要：采用Faraday光谱方法 ,系统研究了交流 (Zeeman调制 )、直流 (光强调制 )磁场下 ,NO2 气体分子的光谱信号随外加磁场的变化关系 .实验结果与理论分析表明 ,NO2 分子的光谱信号与外加磁场呈线性关系 ,由此提出了一种NO2 分子Faraday效应磁强计 ,预期可以测量 5× 10 - 3～ 10 0mT ,DC - 1MHz范围内的磁场 ,并具有良好的线性度 .By means of Faraday spectroscopy, the dependence of the Faraday spectral signal of gaseous NO 2 on the applied magnetic field, both alternating current (by Zeeman modulation) and direct current (by optical intensity modulation), was systemically studied. The Faraday spectral signal is linear to the applied magnetic field based on our experimental result and theoretical analysis. Thus, a molecular magnetometer based on Faraday effect of gaseous NO 2, which can measure a magnetic field of 1×10 -3 ～100 mT and DC-1 MHz with good linearity, was presented.

关 键 词：磁强计 法拉第效应 二氧化氮分子 Faraday光谱 Zeeman调制 光强调制 

分 类 号：O561.3[理学—原子与分子物理]