Graduate Thesis Or Dissertation
 

Integrated forward light scattering as a measure of aerosol mass concentration

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cc08hj802

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  • A mathematical model was developed that relates the ratio, R, of two light flux measurements to the mass concentration, m, of the atmospheric aerosol particles between a source of parallel light (e.g., the sun) and the measuring system. R is defined as the ratio of the light fluxes passing through the pinhole and open positions of an iris diaphragm located in the focal plane of a lens system. The following relationship between the two variables was derived: R = 1/(1 + Km) where K is a constant that depends on the area of the lens surface, the mean wavelength of the incident light, the thickness of the turbid layer of air through which the light travels, and the parameters of the assumed lunge particle size distribution, including the specific gravity of the aerosol. An experimental investigation was conducted under limited laboratory conditions. The results were in agreement with the functional form of the mathematically derived relationship. Quantitative agreement was not achieved between the experimental and mathematical values of K due to the dissimilarities in the experimental and atmospheric aerosol size distributions.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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