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Report No.

Development Method to Estimate the Complex Index of Refraction of Dielectric Aerosols

Kudo, Kazuhiko*; Li, H.*; Li, B.-X.*; Saito, Jun*; Yamaguchi, Akira; Takata, Takashi

A method to estimate complex refractive index of dielectric aerosols is developed. For the purpose, three-dimensional radiative transfer problem in an absorbing-scattering media is solved by the Monte Carlo method. The Mie.s scattering theory is used to handle particle scattering and absorption. Magnesium oxide aerosol, whose complex index of refraction is well known, is selected as the example of the dielectric aerosol. Magnesium is burnt to produce MgO aerosol and the transmission of the radiation from a black body furnace through the aerosol layer is measured. By comparing the analytical results of transmitted energy profile along the wall facing the emission resource, black body furnace, obtained for a wide range of the complex index of refraction, with the experimental results, it is shown that the value of the complex refractive index of the aerosol can be estimated.



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