skip to main content

SciTech ConnectSciTech Connect

Title: 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 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.
Authors:
 [1] ;  [2] ;  [3]
  1. National Research Center “Kurchatov Institute”, 123182, Moscow (Russian Federation)
  2. Ioffe Physical-Technical Institute, RAS, 194021 St. Petersburg (Russian Federation)
  3. X-ray Imaging Center, Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31 Hyoja-dong, Namku, 790-784 Pohang (Korea, Republic of)
Publication Date:
OSTI Identifier:
22251768
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 3; Journal Issue: 12; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 36 MATERIALS SCIENCE; ACCURACY; CROSS SECTIONS; HARD X RADIATION; LEAST SQUARE FIT; SILICON CARBIDES; SYNCHROTRON RADIATION