Neutron imaging of hydrogen-rich fluids in geomaterials and engineered porous media: A review

Perfect, Edmund; Cheng, Chu-Lin; Kang, Misun; Bilheux, Hassina Z.; LaManna, Jacob M.; Gragg, Michael J.; Wright, Daine

doi:10.1016/j.earscirev.2013.11.012

Cited by 136 publications

(80 citation statements)

References 171 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, attenuation-based neutron imaging has been widely adopted to visualize micron-scale structures inside materials (porosity, density inhomogeneity) [11][12][13]. Compared to other imaging techniques such as X-ray imaging, neutron imaging has unique capabilities that allow measurement of bulk components as well as detection of lightweight elements (hydrogen and lithium) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source

et al. 2017

View full text Add to dashboard Cite

Over the past decade, wavelength-dependent neutron radiography, also known as Bragg-edge imaging, has been employed as a non-destructive bulk characterization method due to its sensitivity to coherent elastic neutron scattering that is associated with crystalline structures. Several analysis approaches have been developed to quantitatively determine crystalline orientation, lattice strain, and phase distribution. In this study, we report a systematic investigation of the crystal structures of metallic materials (such as selected textureless powder samples and additively manufactured (AM) Inconel 718 samples), using Bragg-edge imaging at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS). Firstly, we have implemented a phenomenological Gaussian-based fitting in a Python-based computer called iBeatles. Secondly, we have developed a model-based approach to analyze Bragg-edge transmission spectra, which allows quantitative determination of the crystallographic attributes. Moreover, neutron diffraction measurements were carried out to validate the Bragg-edge analytical methods. These results demonstrate that the microstructural complexity (in this case, texture) plays a key role in determining the crystallographic parameters (lattice constant or interplanar spacing), which implies that the Bragg-edge image analysis methods must be carefully selected based on the material structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The fundamental difference in nature of neutrons interaction with matter compared to X-rays provides additional benefits to neutron methods, including sensitivity to light elements, notable difference in contrast between neighboring elements or isotopes, high penetration effect through metals or heavy elements. All these features make neutron radiography and tomography highly demanded tools with growing range of applications in industry, geophysics [Perfect et al (2014)], paleontology, archeology and other various fields, included culture heritage investigations [Middleton et al (2005)]. …”

Section: Introductionmentioning

confidence: 99%

Neutron Radiography Facility at IBR-2 High Flux Pulsed Reactor: First Results

et al. 2015

View full text Add to dashboard Cite

A neutron radiography and tomography facility have been developed recently at the IBR-2 high flux pulsed reactor. The facility is operated with the CCD-camera based detector having maximal field of view of 20x20 cm, and the L/D ratio can be varied in the range 200 -2000. The first results of the radiography and tomography experiments with industrial materials and products, paleontological and geophysical objects, meteorites, are presented.

show abstract

“…Neutron radiography is an effective non-destructive method, which is extremely sensitive to the element of hydrogen12. Therefore, it is often used to detect properties of porous media345 related to the hydrogen element, such as the distribution of water and mineral contents in ceramic, brick and concrete. Particularly, thermal neutrons play a critical role in identifying oil and water in the rock and soil36.…”

mentioning

confidence: 99%

Numerical research on the anisotropic transport of thermal neutron in heterogeneous porous media with micron X-ray computed tomography

Wang

Yue

Zhang

2016

Sci Rep

View full text Add to dashboard Cite

The anisotropic transport of thermal neutron in heterogeneous porous media is of great research interests in many fields. In this paper, it is the first time that a new model based on micron X-ray computed tomography (CT) has been proposed to simultaneously consider both the separation of matrix and pore and the distribution of mineral components. We apply the Monte Carlo method to simulate thermal neutrons transporting through the model along different directions, and meanwhile detect those unreacted thermal neutrons by an array detector on the other side of the model. Therefore, the anisotropy of pore structure can be imaged by the amount of received thermal neutrons, due to the difference of rock matrix and pore-filling fluids in the macroscopic reaction cross section (MRCS). The new model has been verified by the consistent between the simulated data and the pore distribution from X-ray CT. The results show that the evaluation of porosity can be affected by the anisotropy of media. Based on the research, a new formula is developed to describe the correlation between the resolution of array detectors and the quality of imaging. The formula can be further used to analyze the critical resolution and the suitable number of thermal neutrons emitted in each simulation. Unconventionally, we find that a higher resolution cannot always lead to a better image.

show abstract

Neutron imaging of hydrogen-rich fluids in geomaterials and engineered porous media: A review

Cited by 136 publications

References 171 publications

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source

Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source

Neutron Radiography Facility at IBR-2 High Flux Pulsed Reactor: First Results

Numerical research on the anisotropic transport of thermal neutron in heterogeneous porous media with micron X-ray computed tomography

Contact Info

Product

Resources

About