Quantitative hard x-ray phase contrast imaging of micropipes in SiC

Peculiarities of quantitative hard x-ray phase contrast imaging of micropipes in SiC are discussed. The micropipe is assumed as a hollow cylinder with an elliptical cross section. The major and minor diameters can be restored using the least square fitting procedure by comparing the experimental dat...

Full description

Saved in:
Bibliographic Details
Published in:AIP advances 2013-12, Vol.3 (12), p.122109-122109-11
Main Authors: Kohn, V. G., Argunova, T. S., Je, J. H.
Format: Article
Language:English
Subjects:
ACCURACY
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CROSS SECTIONS
Cylinders
Estimation
HARD X RADIATION
Image contrast
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LEAST SQUARE FIT
Least squares
Microscopes
Phase contrast
SILICON CARBIDES
SYNCHROTRON RADIATION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Peculiarities of quantitative hard x-ray phase contrast imaging of micropipes in SiC are discussed. The micropipe is assumed as a hollow cylinder with an elliptical cross section. The major and minor diameters can be restored using the least square fitting procedure by comparing the experimental data, i.e. the profile across the micropipe axis, with those calculated based on phase contrast theory. It is shown that one projection image gives an information which does not allow a complete determination of the elliptical cross section, if an orientation of micropipe is not known. Another problem is a weak accuracy in estimating the diameters, partly because of using pink synchrotron radiation, which is necessary because a monochromatic beam intensity is not sufficient to reveal the weak contrast from a very small object. The general problems of accuracy in estimating the two diameters using the least square procedure are discussed. Two experimental examples are considered to demonstrate small as well as modest accuracies in estimating the diameters.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4846236