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Proceedings Paper

Absolute measurement of high particle number concentrations by simultaneous observation of extinction and scattered laser light
Author(s): Wladyslaw W. Szymanski; Paul E. Wagner
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Paper Abstract

A quantitative measurement of laser light extinction during particle growth in an expansion chamber of a condensation nuclei counter was performed. The attenuated light flux and the light flux scattered at a chosen scattering angle are monitored simultaneously during the particle growth process. From the transmitted light flux vs time the light extinction during particle growth can be determined quantitatively. The experimental scattered light flux vs time allows a precise determination of particle sizes at various times during particle growth. Knowing the actual particle size the light attenuation obtained from the transmitted light flux allotis a direct, quantitative determination of particle number concentration without referring to any calibration of the apparatus and can be regarded as an absolute method.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1269, Environment and Pollution Measurement Sensors and Systems, (1 August 1990); doi: 10.1117/12.20343
Show Author Affiliations
Wladyslaw W. Szymanski, Univ. of Vienna (Austria)
Paul E. Wagner, Univ. of Vienna (Austria)


Published in SPIE Proceedings Vol. 1269:
Environment and Pollution Measurement Sensors and Systems
Hans Ole Nielsen, Editor(s)

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