On multiple optical scattering in a scanning nephelometer
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On multiple optical scattering in a scanning nephelometer by David M. Barnett

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Published .
Written in English


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Edition Notes

Thesis (Ph.D.) - Loughborough University, 2000.

Statementby David M. Barnett.
ID Numbers
Open LibraryOL18879946M

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Hysteresis behavior can be probed by designing multiple pre-humidification/drying steps before the controlled-RH nephelometer measurement is taken (Fierz-Schmidhauser et al., a,b). For example, the scattering coefficient at an intermediate RH, for example 65%, can be determined either by fully drying the ambient aerosol to low RH and then. In this case, in situ measurements of the aerosol scattering made by a nephelometer can provide useful information when applying the optical depth solution [e.g., Flamant et al., ]. A variant of this method, known as the one angle method (OAM) was developed for clear atmospheres by Kovalev [] using a combination of the optical depth Cited by:   Titos et al. 27 provide a comprehensive review of experimental designs of commonly used tandem humidified nephelometer systems. Scattering Cited by: 1. A nephelometer is an instrument that contains a light source, a detector arranged at a right angle to the light beam and in between an optical light scattering collector. These are dedicated instruments, only available as standalone plate readers.

  Light scattering is an important tool for gathering information about the structure and origin of atmospheric aerosols. We build a polarized scanning nephelometer to measure the properties of aerosol particles. The aerosol scattering coefficient and Ångström exponent (AE) are important parameters in the understanding of aerosol optical properties and aerosol direct effect. These parameters are usually measured by a nephelometer network which is under-represented geographically; however, a rapid growth of air-pollution monitoring, using low-cost particle sensors, may extend observation networks.   Scattering and roughness characterization of silicon Particle scanner inspection of wafers Computer Disks Contamination Measurement by Wavelength Discrimination Solar Energy Applications Photovoltaic collectors General Manufacturing Examples Detection of paper flaws. Aerosol optical properties (aerosol volume size distributions and single scattering albedos) were retrieved from spectral sun and sky radiance data by an iterative algorithm (Dubovik and King ) with the following initial guess: dV/d lnR = , n(λ i) = , k(λ i) = , where dV/d lnR denotes aerosol volume size distribution, and n.

  At μm, the polar nephelometer data are dominated by the effect of coarse-mode hydrated sea salt. Although the inversion was unable to place constraints on the accumulation-mode size distribution, the modeled size distribution provides a good description of optical scattering at wavelengths of μm and above. Time and range resolved multiple-scattered radiation from the aureole around a traveling radiation, using an additional off axis scanning lidar-receiver, on top of an existing lidar. This system can be considered as an analogue equivalent of Bissonnette's fixed multi-field-of-view lidar. Intralipid is a scattering agent broadly used in phantoms to reproduce the optical scattering coefficient μ s and the anisotropy coefficient g of real tissues. Intralipid is biologically similar to the bilipid membrane of cells and organelles 1, 10 —the major constituents causing optical scattering in tissue. A laser diffractometer (polar nephelometer) constructed for single-particle studies is described. It takes advantage of an array of optical fibres and a scanning disc to allow the use of a single.