利用共轴多角度系统研究大气气溶胶前向散射的角度分布特性

Study on Angular Distribution of Aerosol Forward-scattering Using Coaxial Multi-angle System

从Mie散射理论的公式分析中发现,大气气溶胶的消光和散射角有关。设计了一种共轴多角度探测系统,利用该系统研究了气溶胶的消光随角度变化呈现的特性。该系统在不同的散射角上,对气溶胶的消光系数进行测量,通过实验数据分析得出;前向散射角在30°～45°之间的气溶胶散射消光系数与散射光强成线性。

Analyzing the formulas of Mie theory, it＇s found that aerosol extinction is related to the scattering angle. A coaxial multi-angle forward-scattering system was designed and the change of aerosol extinction followed the various scattering angles were researched using this system. With different scattering angles, extinction coefficients were measured. Analyzing experiment data, results showed that the scattering extinction coefficient has poor sensitivity to the particle size distribution and is linear with the scattering intens .when the scattering angles vary from 30°to 45°.