Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-Resolution Neutron and X-Ray Imaging of Granular Materials
High spatial resolution () neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution () using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.
High-Resolution Neutron and X-Ray Imaging of Granular Materials
High spatial resolution () neutron tomography was performed on partially water-saturated compacted silica sand specimens with two different grain morphologies (round and angular) at Helmholtz Zentrum Berlin using cold neutrons at the cold neutron radiography and tomography beam line. A specimen mixed with heavy water was imaged for contrast comparison purposes. Microfocus X-ray imaging was also performed on these specimens with slightly higher resolution () using geometric magnification to locate the solid phase (silica particle boundaries) more precisely. Image processing was performed to remove unwanted gammas detected because of the gadox scintillator used for the high-resolution neutron imaging system. The visualization of solid, gas, and liquid phases for different grain morphologies is presented at the grain level. Using dual-modal contrast possible from simultaneous use of neutrons and X-rays, the authors introduce, for the first time, an improved ability to distinguish solid silica, liquid water, and gas phases. Quantitative analysis using three-dimensional tomography data is demonstrated for obtaining void ratio, void percentage variation over the height, and particle size distribution.
High-Resolution Neutron and X-Ray Imaging of Granular Materials
Kim, Felix H. (Autor:in) / Penumadu, Dayakar (Autor:in) / Gregor, Jens (Autor:in) / Kardjilov, Nikolay (Autor:in) / Manke, Ingo (Autor:in)
Journal of Geotechnical and Geoenvironmental Engineering ; 139 ; 715-723
04.08.2012
92013-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
High-Resolution Neutron and X-Ray Imaging of Granular Materials
| Online Contents | 2013
High-Resolution Neutron and X-Ray Imaging of Granular Materials
| British Library Online Contents | 2013
Water Distribution Variation in Partially Saturated Granular Materials Using Neutron Imaging
Online Contents | 2012
Water Distribution Variation in Partially Saturated Granular Materials Using Neutron Imaging
| Online Contents | 2012
Water Distribution Variation in Partially Saturated Granular Materials Using Neutron Imaging
| British Library Online Contents | 2012