G - Physics – 01 – N
Patent
G - Physics
01
N
358/7
G01N 23/06 (2006.01) G01N 23/08 (2006.01)
Patent
CA 1252917
METHOD AND APPARATUS FOR ANALYZING A POROUS NONHOMOGENEOUS CYLINDRICAL OBJECT ABSTRACT Nondestructive analysis of a porous, inhomogeneous, generally cylindrical object, such as a soot boule, comprised of n known components, where n is an integer, is achieved by scanning the boule with a beam comprised of photons, each having a distinct energy within one n-1 energy groups. The intensity of the photons within each of the n-1 energy groups leaving the boule is detectedby a detector and is measured by a pulse height/scaler analyzer at each of a plurality of separate heights ti of the beam as measured from the center of the boule. A computer determines each of n-1 attenuation coefficients µ1(r), µ2(r),...µn(r), representing the attenuation of the intensity of the photons in each of the n-1 energy groups, respectively, at each height ti of the beam in accordance with the output data furnished by the scaler/analyzer. From the n-1 attenuation coefficients, the computer determines the density p(r) and the respective molecular mass fractions x1(r), x2(r)...xn(r) of the n molecular components of the boule at each height ti of the beam.
497728
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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