Accession Number : ADA258069


Title :   Characterization of Spheres With The Submicron Particle Analyzer: Feasibility


Descriptive Note : Final rept. Oct 1990-Sep 1991


Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD


Personal Author(s) : Bottiger, Jerold R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258069.pdf


Report Date : Sep 1992


Pagination or Media Count : 71


Abstract : A method is described for inverting light scattering data to find the size parameter (x) and refractive index (n) of small dielectric spheres. The data considered is restricted to that obtainable with the U.S. Army Chemical Research, Development and Engineering Center's Submicron Particle Analyzer (i.e. , ratios of intensities detected at a number of fixed directions about the scattering sphere). The inversion process works by comparing measured flux ratios with the same ratios previously calculated over a range of x,n values, and finding those x,n pairs for which measured and calculated ratios are consistently in agreement, to within the experimental uncertainty. Using numerical simulations of measurements and estimating the experimental error to be +/- 10%, we find that about 13 ratio measurements are needed to perform satisfactory inversions.


Descriptors :   *LIGHT , *SPHERES , *PARTICLES , *ANALYZERS , *INVERSION , SIMULATION , LIGHT SCATTERING , MEASUREMENT , RATIOS , UNCERTAINTY , SCATTERING , FIBERS , OPTICAL MATERIALS , NUMBERS , ARMY , AGREEMENTS , VALUE , INDEXES , ERRORS , ENGINEERING , REFRACTIVE INDEX , AEROSOLS , CHEMICALS , PARAMETERS , FLUX(RATE) , DIELECTRICS , INTENSITY


Subject Categories : Physical Chemistry
      Optics
      Particle Accelerators


Distribution Statement : APPROVED FOR PUBLIC RELEASE