Investigation of low-angle laser light scattering patterns using the modified Twomey iterative method for particle sizing

Review of Scientific Instruments Volume 82 Issue 1 Page 015111-1-015111-10 published_at 2011-01-31
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Title ( eng )
Investigation of low-angle laser light scattering patterns using the modified Twomey iterative method for particle sizing
Creator
Igushi Tatsuo
Source Title
Review of Scientific Instruments
Volume 82
Issue 1
Start Page 015111-1
End Page 015111-10
Abstract
We first applied the Twomey iteration method to the low-angle laser light scattering (LALLS) method. The Twomey method is known by the simple iteration algorithm for Fredholm integral equation. However, the algorithm is not applied to the LALLS result itself because the kernel function pattern is not stable. We solved the unstable kernel issue by modifying the Twomey algorithm to fit the LALLS data in this study. The performance of inversion was studied by computer simulation and experimental results from detectors containing 24 elements from angle 0.0005 to 2.5 rad. The computer simulation was carried out for particles of mean sizes from 0.1 to 1000 μm with mono-dispersion and log-normal distributions. A conventional algorithm is also carried out to compare the performance of the Twomey method. The noise effect of the inverse problem was tested by computer simulation. Experimental results were measured with standard polystyrene latex from 0.081 to 1007 μm. All the tests were performed under conditions in which the light from a linearly polarized laser at 633 nm was scattered by a diluted aqueous suspension. The modified Twomey (MT) method and conventional method show good reproduction results for particles with log-normal distributions. However, narrow distribution particles indicate that the MT method shows excellent reproduction results when compared with the conventional method.
NDC
Electrical engineering [ 540 ]
Language
eng
Resource Type journal article
Publisher
American Institute of Physics
Date of Issued 2011-01-31
Rights
Copyright (c) 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0034-6748
[DOI] 10.1063/1.3520136
[NCID] AA00817730
[URI] http://link.aip.org/link/?rsi/82/015111
[DOI] http://dx.doi.org/10.1063/1.3520136