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Proceedings Paper

Light scattering by aerosol particles and air in the molecular condensation nuclei (MCN) detector
Author(s): Vladimir D. Kuptsov; Vadim Y. Katelevsky; Vladimir P. Valyukhov; Evgeniy N. Rybin
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Paper Abstract

The principal foundations, specific features and application fields of the advanced highly sensitive method of gas impurities detection - molecular condensation nuclei (MCN) method are discussed. MCN method is based on the conversion of impurity molecules to condensation nuclei of much larger size followed by the nuclei enlargement in the supersaturated vapor of specially selected low-volatile organic substances and detection of produced aerosol particles using an optical (nephelometric) method. The light scattering properties of the aerosol particles and air in the photometer of an MCN detector as well as sensitivity of the photometer’s photodetector are investigated. We have determined that the light scattering by aerosol particles is interferometric by nature and is comparable within an order of magnitude with light scattering by the air inside a photometer. The threshold sensitivity of fotointegrator was reduced a level where the detection limit for the gas analyzer target component is determined by the background level of spontaneous condensation and not by the sensitivity of the detector’s photoreceiver.

Paper Details

Date Published: 5 September 2014
PDF: 11 pages
Proc. SPIE 9205, Reflection, Scattering, and Diffraction from Surfaces IV, 92050Q (5 September 2014); doi: 10.1117/12.2059832
Show Author Affiliations
Vladimir D. Kuptsov, Saint-Petersburg State Polytechnical Univ. (Russian Federation)
Vadim Y. Katelevsky, ENPO Neorganika (Russian Federation)
Vladimir P. Valyukhov, Saint-Petersburg State Polytechnical Univ. (Russian Federation)
Evgeniy N. Rybin, ENPO Neorganika (Russian Federation)

Published in SPIE Proceedings Vol. 9205:
Reflection, Scattering, and Diffraction from Surfaces IV
Leonard M. Hanssen, Editor(s)

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