
Proceedings Paper
Using a laser aureole to study aerosolsFormat | Member Price | Non-Member Price |
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Paper Abstract
Aerosol optical scattering experiments are often large, expensive, and provide poor control of dust uniformity and size
distribution. The size distribution of such suspended atmospheric aerosols varies rapidly in time, since larger particles
settle quickly. Even in large chambers, 10 micron particles settle in tens of seconds. We describe lab-scale experiments
with stable particle distributions. A viscous colloidal solution can stabilize the particles for sufficient time to measure
optical scattering properties. Colloids with different concentrations or size distributions enable nearly time independent
studies of prepared distributions. We perform laser aureole scattering from a colloid containing a few percent by volume
of Arizona Road Dust (ARD) in mineral oil and glycerin, and 1-micron polystyrene spheres in water. We discuss aureole
analysis, the differences expected in scattering properties due to the index of refraction of the mineral oil medium versus
air, and the impact of non-spherical shape on the scattering. This research demonstrates that particles suspended in a
viscous medium can be used to simulate aerosol optical scattering in air, while enabling signal averaging, offering
reproducibility, and easing problems resulting from parameter variations in studies of dust properties.
Paper Details
Date Published: 20 May 2013
PDF: 12 pages
Proc. SPIE 8731, Laser Radar Technology and Applications XVIII, 87310O (20 May 2013); doi: 10.1117/12.2017707
Published in SPIE Proceedings Vol. 8731:
Laser Radar Technology and Applications XVIII
Monte D. Turner; Gary W. Kamerman, Editor(s)
PDF: 12 pages
Proc. SPIE 8731, Laser Radar Technology and Applications XVIII, 87310O (20 May 2013); doi: 10.1117/12.2017707
Show Author Affiliations
Brandon J. N. Long, North Carolina State Univ. (United States)
D. A. Hook, North Carolina State Univ. (United States)
Garrett E. Pangle, North Carolina State Univ. (United States)
D. A. Hook, North Carolina State Univ. (United States)
Garrett E. Pangle, North Carolina State Univ. (United States)
Hans D. Hallen, North Carolina State Univ. (United States)
C. Russell Philbrick, North Carolina State Univ. (United States)
C. Russell Philbrick, North Carolina State Univ. (United States)
Published in SPIE Proceedings Vol. 8731:
Laser Radar Technology and Applications XVIII
Monte D. Turner; Gary W. Kamerman, Editor(s)
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