Real-Time Concentration Monitoring of Large Aerodynamic Diameter Fiber Aerosols Using the Geometric Optic Inversion Technique
Final rept. May 1986-Jun 1990
CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD
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Characterization of screening aerosols requires a measurement of the concentration of the aerosol cloud. For large aerodynamic diameter materials this is not always feasible. An alternate method, using geometric optic inversion, is described and derived. This inversion employs measurement of the transmission through the material by a short wavelength energy beam, such as Helium Neon laser. The transmission is then used to calculate the concentration of the material. Cloud concentrations calculated by this method are compared to measured concentrations, employing a unique sampling filter. Keywords Aerosol Geometrics Optics Concentrations Transmittance Extinction Pathlength.