Actions for Polar nephelometer for atmospheric particulate studies

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Polar nephelometer for atmospheric particulate studies

Author
Hansen, M. Z.
Published
JAN 1, 1980.
Physical Description
1 electronic document
Additional Creators
Evans, W. H.
Online Version

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Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
A polar nephelometer for use in studying atmospheric aerosols was developed. The nephelometer detects molecular scatter from air and measures scattering from very clean air using pure molecular scattering for calibration. A compact system using a folded light path with an air cooled argon laser for the light source was designed. A small, sensitive detector unit permits easy angular rotation for changing the scattering angle. A narrow detector field of view of + or - 1/4 degree of scattering along with a single wavelength of incident light is used to minimize uncertainties in the scattering theory. The system is automated for data acquisition of the scattering matrix elements over an angular range from 2 degrees to 178 degrees of scattering. Both laser output and detector sensitivity are monitored to normalize the measured light scattering.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19800023489.
Accession ID: 80N31996.
NASA-TM-81113.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15721344