scholarly journals Non-Destructive Imaging of a Liquid Moving Through Porous Media Using a Computer Tomography Scanner

2020 ◽  
Author(s):  
Daniel Kaplan ◽  
Kenneth Gibbs ◽  
Abdullah Mamun ◽  
Brian Powell
Keyword(s):  
Porous Media ◽  
Computer Tomography ◽  
Liquid Moving ◽  
Non Destructive

Three Dimensional Reconstruction of Activity Profiles in 220 Liters Radioactive Waste Packages Containing Supercompacted 100 Liters Drums

2007 ◽  
Author(s):  
L. P. M. van Velzen ◽  
J. Maes
Keyword(s):  
Radioactive Waste ◽  
Computer Tomography ◽  
Hot Spot ◽  
Three Dimensional ◽  
Working Environment ◽  
Design Parameters ◽  
Dimensional Reconstruction ◽  
Safety Systems ◽  
Spot 5 ◽  
Non Destructive

The 3DRedact project’s main objective is the development of a non-destructive assay (NDA) system that can replace emission computer tomography (ECT) and transmission computer tomography (TCT) for the routine characterization of decayed radioactive waste 220 liters drums. The existing fast NDA scan system has been extended with a transmission system that fulfils the requirements of fast scan measurements. The design parameters and engineering are described. As a consequence of this extension the analyze program HOLIS had to be updated, so that HOLIS can make full advantage of the transmission data generated by the analysis of a 220 liters waste drum, containing different super compacted drums. The achievements of the new HOLIS version are presented. As a first assessment, based on the presented tests results, the accuracy of the calculated coordinates of hotspots can be assessed for all coordinates ± 1 cm and for the activity of the hot-spot ± 5%. These accuracies are within the predefined requirements e.g. coordinates uncertainty ± 2 cm and activity less than 10%. Further, additional safety systems have been installed to improve a healthy and save working environment.

X-ray Nano- and Micro-tomography in an SEM

2013 ◽  
Vol 21 (2) ◽  
pp. 24-28 ◽  
Author(s):  
Bart Pauwels ◽  
Alexander Sasov
Keyword(s):  
Computer Tomography ◽  
Small Angle ◽  
Reconstruction Algorithm ◽  
X Ray ◽  
Projection Images ◽  
Micro Tomography ◽  
Ray Projection ◽  
Set Up ◽  
Rotation Stage ◽  
Non Destructive

X-ray microfocus computer tomography (μ-CT) is a non-destructive experimental technique that reveals the 3D internal microstructure of the sample under study. The experimental set-up consists of an X-ray source, an X-ray detector, and set in between is a sample that is placed on a rotation stage. With this set-up multiple X-ray projection images can be obtained from the sample at different angles. In between the acquisition of two successive images, the sample is rotated over a small angle, typically between 0.2° and 1°. This set of projection images is then used as input for the reconstruction algorithm, which calculates a reconstruction of the internal microstructure of the sample with (sub-) micrometer sensitivity.

scholarly journals Application of Industrial Computer Tomography to Determine Wood Porosity

2021 ◽  
Vol 29 (49) ◽  
pp. 15-23
Author(s):  
Eva Buranská ◽  
Peter Rantuch ◽  
Ivan Buranský ◽  
Alexandra Kucmanová
Keyword(s):  
Heat Treatment ◽  
Thermal Treatment ◽  
Computer Tomography ◽  
Subject Matter ◽  
Total Porosity ◽  
Light Metal ◽  
Paulownia Tomentosa ◽  
Before And After ◽  
The Subject ◽  
Non Destructive

Abstract The main objective of this research was to analyse the limitations of iCT - industrial computer tomography for measuring the wood pores characteristics as a new non-destructive method which is primarily intended to measure and inspect complete components primarily made of plastics or light metal. The subject matter of this paper are wood samples of paulownia (Paulownia tomentosa) and ash (Fraxinus excelsior) before and after thermal treatment. Porosity, pore volume and distribution of pores on the wood samples before and after the heat treatment were measured by iCT Metrotom 1500. The total porosity of the samples before thermal treatment was 5.28 % (paulownia) and 14.90 % (ash), while after thermal treatment, porosity increased to 9.50 % (paulownia) and to 30.78 % (ash). Changes in the porosity of the samples before and after heat treatment show an increase in porosity of 3.87 % (paulownia) and 15.88 % (ash).

scholarly journals Biofilm imaging in porous media by laboratory X-Ray tomography: Combining a non-destructive contrast agent with propagation-based phase-contrast imaging tools

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0180374 ◽  
Author(s):  
Maxence Carrel ◽  
Mario A. Beltran ◽  
Verónica L. Morales ◽  
Nicolas Derlon ◽  
Eberhard Morgenroth ◽  
...  
Keyword(s):  
Porous Media ◽  
Contrast Agent ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Non Destructive

Selected Magnetic Resonance applications for non-destructive material testing

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Daniel Haddad ◽  
Philipp Mörchel ◽  
Markus Hildenbrand ◽  
Karl-Heinz Hiller
Keyword(s):  
Porous Media ◽  
Magnetic Resonance ◽  
Material Testing ◽  
Food Samples ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Laboratory Environment ◽  
Recent Developments ◽  
Non Destructive

AbstractMagnetic resonance’s potential is already proven in the clinical sector and for non-destructive testing also in the laboratory environment. With recent developments in technology today’s small and midsized often portable MR systems are also able to work in an industrial setup and in the field. Therefore, the number of MR applications is rapidly increasing as is the acceptance of MR as technique for non-destructive testing. Selected examples for magnetic resonance in polymers, in porous media and in food samples are shown here.

scholarly journals Characterization of the Parameters of Sand Moulds in Compaction Process by Use of the Industrial Computer Tomography (ICT)

2014 ◽  
Vol 59 (3) ◽  
pp. 1097-1101 ◽  
Author(s):  
A. Kadauw
Keyword(s):  
Computer Tomography ◽  
Numerical Solutions ◽  
Local Density ◽  
Industrial Condition ◽  
Trial And Error Method ◽  
Compaction Processes ◽  
Contact Free ◽  
Non Destructive

Abstract One main problem in moulding is the proper characterization of the local density of the mould, the best without its destroying, for assessment the quality of the mould and to compare results of compaction modeling with experimental results. Industrial computer tomography (ICT) is a technique that allows the non-destructive and contact-free visualization and characterization of the internal and external parts of physical objects including also sand moulds. It is possible to apply ICT technique for the specific research presented here. Moulding sand compaction plays an important role for the quality of the mould and as the consequence for the quality of manufactured casting. The required quality of the castings can be achieved by selecting optimum manufacturing process parameters. The determination of these parameters is often carried out by trial-and-error-method, which is expensive and time consuming. To improve the understanding of the influence of various parameters, mathematical modeling of the compaction processes using numerical solutions was performed. Theoretical results of the compaction simulations have then been compared with practical results of mould compaction obtained by ICT. Itwasfound that simulation results agree well with data from computer tomography and provide insight into the spatial distribution of the density of sand moulds under industrial condition.

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