Abstract

A new optical particle counter was developed to provide fast in situ sizing of cloud droplets in the Leipzig Aerosol and Cloud Interaction Simulator (LACIS). The new instrument features white light for the illumination of the sampling volume: two off-axis elliptical mirrors, providing a wide angle of collection for light scattered by particles; and an optically defined sampling volume. The smooth unambiguous response characteristic for water droplets allows direct conversion of the measured signal amplitudes into droplet diameters. Preliminary response measurements for dry polystyrol microspheres and water droplets, grown in the LACIS on NaCl particles, have shown good agreement with the corresponding calculated response curves.

© 2005 Optical Society of America

Optical particle sizing for in situ measurements Part 1

Don Holve and Sidney A. Self
Appl. Opt. 18(10) 1632-1645 (1979)

Efficiency of Light-Scattering Aerosol Particle Counters

R. G. Pinnick and D. J. Hofmann
Appl. Opt. 12(11) 2593-2597 (1973)

Measured Light-Scattering Properties of Individual Aerosol Particles Compared to Mie Scattering Theory

R. G. Pinnick, J. M. Rosen, and D. J. Hofmann
Appl. Opt. 12(1) 37-41 (1973)

Determination of polar stratospheric cloud particle refractive indices by use of in situ optical measurements and T-matrix calculations

Claudio Scarchilli, Alberto Adriani, Francesco Cairo, Guido Di Donfrancesco, Carlo Buontempo, Marcel Snels, Maria Luisa Moriconi, Terry Deshler, Niels Larsen, Beiping Luo, Konrad Mauersberger, Joelle Ovarlez, Jim Rosen, and Jochen Schreiner
Appl. Opt. 44(16) 3302-3311 (2005)

Optical particle sizing for in situ measurements Part 2

Don Holve and Sidney A. Self
Appl. Opt. 18(10) 1646-1652 (1979)