|Alternative Title||Differential Scattering Cross Section and Phase Shift of Partially Charged Spherical Sand Particle System
|Place of Conferral||兰州
|Other Abstract||The existing theoretical and experimental research found that the partially charged sand particles will influence the incident EM wave with varying degrees. This paper starts the research based on the scattering process of EM waves acted by partially charged sand particles and the differential scattering cross section and phase of partially charged sand particle system. The main work is as follows:
Firstly, the surface charge layer and sand particles are treated as a kind of layered scattering media according to the propagation property of EM waves and the layered propagation mechanism of EM waves in the partially charged sand particles is put forward, namely: when the EM waves irradiate on the uncharged region, they can pass through the sand media, and then part of the EM waves go through the charged region after scattering; when the EM waves directly irradiate charged region, they propagate and scatter only in the charged region.
Then, this paper derives the differential scattering cross section and phase of partially charged spherical sand particle system according to the generalized Lorenz-Mie theory and obtains the influence results of partially charged spherical sand particle system . The results show that: charged sand particles have a significant influence on the differential scattering cross section, which will be increased when the surface charge increase, indicating that the excess surface charge enhances the EM wave scattering; under the same condition.when the grains of sand on the surface of partial charged phase increases with the increase of charge. phase space is larger than the value of single scattering approximation when considering multiple scattering effects and charged sand particles will influence the critical distance of multiple scattering.|
汪亚龙. 局部带电球形沙粒系统的微分散射截面和相移[D]. 兰州. 兰州大学,2014.
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