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A Method for the Production and Determination of the Characteristics of Water Droplet Aerosols in the Above-Micron Range

Nissim DayanDept. of Atmospheric Sciences, The Hebrew University of Jesrusalem, Jesrusalem, Israel

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Isaiah GallilyDept. of Atmospheric Sciences, The Hebrew University of Jesrusalem, Jesrusalem, Israel

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Abstract

A generator of water aerosols that produces almost uniform droplets in the above-micron range is described. The operational behavior and the effect of various parameters of the apparatus is reported. Attention is also paid to the rarely discussed electric charges of the particles, which can be neutralized at will.

The aim distribution of the droplets is determined both by a rate of fall and a light attenuation/weight method that cheek reasonably well; the number concentration is derived from the size distribution and the weight of the particles per unit volume while the charge is found from the mobility in a horizontal electric field.

Abstract

A generator of water aerosols that produces almost uniform droplets in the above-micron range is described. The operational behavior and the effect of various parameters of the apparatus is reported. Attention is also paid to the rarely discussed electric charges of the particles, which can be neutralized at will.

The aim distribution of the droplets is determined both by a rate of fall and a light attenuation/weight method that cheek reasonably well; the number concentration is derived from the size distribution and the weight of the particles per unit volume while the charge is found from the mobility in a horizontal electric field.

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